Seattle (SEA) to Sydney (SYD), December 2026: flights from $850 one way

Lowest published fares in December 2026: $1,400 round trip, Axel-exclusive, Air Canada, 1 stop, Dec 1–4, 2026; $850 one way, Axel-exclusive, Air Canada, 1 stop, Dec 1, 2026; 188 priced flights on 94 exact dates, 1 adult, economy, checked Oct 29, 2026.

Compare flight prices from Seattle to Sydney for your dates. There are no recent complete one-adult round trips here to set a price target.

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Flights in December 2026

Lowest published fares in December 2026: $1,400 round trip, Axel-exclusive, Air Canada, 1 stop, Dec 1–4, 2026; $850 one way, Axel-exclusive, Air Canada, 1 stop, Dec 1, 2026; 188 priced flights on 94 exact dates, 1 adult, economy, checked Oct 29, 2026. Flights for 1 adult in economy. Prices are total for all travelers in USD, including required taxes. Basic economy may apply.

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Seattle (SEA) to Sydney (SYD): December 2026

Hotels in Sydney for these trips

Hotels: under a trip, hotels in Sydney for exactly those nights link to the hotel pages for 2 adults in 1 room. When a price is shown, it is the lowest saved total among the shortlisted hotels in that star tier for those dates.

• Hotels in Sydney for these nights (Dec 1–4, 2026 · 3 nights · 2 adults, 1 room): 3★ Dalziel Lodge, $295 total · 4★ Citadines Connect Sydney Airport, $385 total · 5★ The Star Grand Residences, $704 total
• Hotels in Sydney for these nights (Dec 1–8, 2026 · 7 nights · 2 adults, 1 room): 3★ Dalziel Lodge, $669 total · 4★ Citadines Connect Sydney Airport, $870 total · 5★ The Star Grand Residences, $1,977 total
• Hotels in Sydney for these nights (Dec 2–5, 2026 · 3 nights · 2 adults, 1 room): 3★ Dalziel Lodge, $310 total · 4★ Citadines Connect Sydney Airport, $403 total · 5★ The Star Grand Residences, $764 total
• Hotels in Sydney for these nights (Dec 2–9, 2026 · 7 nights · 2 adults, 1 room): 3★ Dalziel Lodge, $594 total · 4★ Citadines Connect Sydney Airport, $862 total · 5★ QT Sydney, $2,028 total
• Hotels in Sydney for these nights (Dec 3–6, 2026 · 3 nights · 2 adults, 1 room): 3★ Dalziel Lodge, $312 total · 4★ Citadines Connect Sydney Airport, $438 total · 5★ The Old Clare by Ode Hotels, $915 total
• Hotels in Sydney for these nights (Dec 3–10, 2026 · 7 nights · 2 adults, 1 room): 3★ Dalziel Lodge, $522 total · 4★ Citadines Connect Sydney Airport, $869 total · 5★ QT Sydney, $2,096 total
• Hotels in Sydney for these nights (Dec 4–7, 2026 · 3 nights · 2 adults, 1 room): 3★ Dalziel Lodge, $285 total · 4★ Citadines Connect Sydney Airport, $396 total · 5★ The Old Clare by Ode Hotels, $854 total
• Hotels in Sydney for these nights (Dec 4–11, 2026 · 7 nights · 2 adults, 1 room): 3★ Dalziel Lodge, $437 total · 4★ Citadines Connect Sydney Airport, $864 total · 5★ QT Sydney, $2,074 total
• Hotels in Sydney for these nights (Dec 5–8, 2026 · 3 nights · 2 adults, 1 room): 3★ Dalziel Lodge, $263 total · 4★ Citadines Connect Sydney Airport, $331 total · 5★ QT Sydney, $800 total
• Hotels in Sydney for these nights (Dec 5–12, 2026 · 7 nights · 2 adults, 1 room): 3★ Dalziel Lodge, $347 total · 4★ Citadines Connect Sydney Airport, $880 total · 5★ QT Sydney, $2,146 total
• Hotels in Sydney for these nights (Dec 6–9, 2026 · 3 nights · 2 adults, 1 room): 3★ Dalziel Lodge, $189 total · 4★ Citadines Connect Sydney Airport, $306 total · 5★ QT Sydney, $743 total
• Hotels in Sydney for these nights (Dec 6–13, 2026 · 7 nights · 2 adults, 1 room): 3★ Dalziel Lodge, $273 total · 4★ Citadines Connect Sydney Airport, $961 total · 5★ Ovolo Sydney Woolloomooloo, a Wyndham Hotel, $2,176 total
• Hotels in Sydney for these nights (Dec 7–10, 2026 · 3 nights · 2 adults, 1 room): 3★ Dalziel Lodge, $131 total · 4★ Citadines Connect Sydney Airport, $342 total · 5★ Ovolo Sydney Woolloomooloo, a Wyndham Hotel, $851 total
• Hotels in Sydney for these nights (Dec 7–14, 2026 · 7 nights · 2 adults, 1 room): 3★ Dalziel Lodge, $215 total · 4★ Citadines Connect Sydney Airport, $1,023 total · 5★ Ovolo Sydney Woolloomooloo, a Wyndham Hotel, $2,201 total
• Hotels in Sydney for these nights (Dec 8–11, 2026 · 3 nights · 2 adults, 1 room): 3★ Dalziel Lodge, $63 total · 4★ Citadines Connect Sydney Airport, $379 total · 5★ Ovolo Sydney Woolloomooloo, a Wyndham Hotel, $876 total
• Hotels in Sydney for these nights (Dec 8–15, 2026 · 7 nights · 2 adults, 1 room): 3★ Dalziel Lodge, $147 total · 4★ Citadines Connect Sydney Airport, $1,022 total · 5★ QT Sydney, $2,179 total
• Hotels in Sydney for these nights (Dec 9–12, 2026 · 3 nights · 2 adults, 1 room): 3★ Dalziel Lodge, $63 total · 4★ Citadines Connect Sydney Airport, $421 total · 5★ Ovolo Sydney Woolloomooloo, a Wyndham Hotel, $938 total
• Hotels in Sydney for these nights (Dec 9–16, 2026 · 7 nights · 2 adults, 1 room): 3★ Dalziel Lodge, $147 total · 4★ Citadines Connect Sydney Airport, $1,012 total · 5★ QT Sydney, $2,029 total
• Hotels in Sydney for these nights (Dec 10–13, 2026 · 3 nights · 2 adults, 1 room): 3★ Dalziel Lodge, $63 total · 4★ The Branksome Hotel And Residences, $501.50 total · 5★ Ovolo Sydney Woolloomooloo, a Wyndham Hotel, $1,058 total
• Hotels in Sydney for these nights (Dec 10–17, 2026 · 7 nights · 2 adults, 1 room): 3★ Dalziel Lodge, $147 total · 4★ Citadines Connect Sydney Airport, $1,002 total · 5★ QT Sydney, $1,861 total
• Hotels in Sydney for these nights (Dec 11–14, 2026 · 3 nights · 2 adults, 1 room): 3★ Dalziel Lodge, $63 total · 4★ The Branksome Hotel And Residences, $481.50 total · 5★ QT Sydney, $1,035 total
• Hotels in Sydney for these nights (Dec 11–18, 2026 · 7 nights · 2 adults, 1 room): 3★ Dalziel Lodge, $147 total · 4★ Citadines Connect Sydney Airport, $989 total · 5★ QT Sydney, $1,727 total
• Hotels in Sydney for these nights (Dec 12–15, 2026 · 3 nights · 2 adults, 1 room): 3★ Dalziel Lodge, $63 total · 4★ The Branksome Hotel And Residences, $422.50 total · 5★ QT Sydney, $833 total
• Hotels in Sydney for these nights (Dec 12–19, 2026 · 7 nights · 2 adults, 1 room): 3★ Dalziel Lodge, $147 total · 4★ Citadines Connect Sydney Airport, $939 total · 5★ QT Sydney, $1,557 total
• Hotels in Sydney for these nights (Dec 13–16, 2026 · 3 nights · 2 adults, 1 room): 3★ Dalziel Lodge, $63 total · 4★ Citadines Connect Sydney Airport, $357 total · 5★ QT Sydney, $547 total
• Hotels in Sydney for these nights (Dec 13–20, 2026 · 7 nights · 2 adults, 1 room): 3★ Dalziel Lodge, $143 total · 4★ Citadines Connect Sydney Airport, $831 total · 5★ QT Sydney, $1,337 total
• Hotels in Sydney for these nights (Dec 14–17, 2026 · 3 nights · 2 adults, 1 room): 3★ Dalziel Lodge, $63 total · 4★ Citadines Connect Sydney Airport, $321 total · 5★ QT Sydney, $519 total
• Hotels in Sydney for these nights (Dec 14–21, 2026 · 7 nights · 2 adults, 1 room): 3★ Dalziel Lodge, $139 total · 4★ Citadines Connect Sydney Airport, $765 total · 5★ QT Sydney, $1,309 total
• Hotels in Sydney for these nights (Dec 15–18, 2026 · 3 nights · 2 adults, 1 room): 3★ Dalziel Lodge, $63 total · 4★ Citadines Connect Sydney Airport, $346 total · 5★ The Star Grand Residences, $500 total
• Hotels in Sydney for these nights (Dec 15–22, 2026 · 7 nights · 2 adults, 1 room): 3★ Dalziel Lodge, $241 total · 4★ Citadines Connect Sydney Airport, $761 total · 5★ QT Sydney, $1,320 total
• Hotels in Sydney for these nights (Dec 16–19, 2026 · 3 nights · 2 adults, 1 room): 3★ Dalziel Lodge, $63 total · 4★ Citadines Connect Sydney Airport, $348 total · 5★ The Star Grand Residences, $550 total
• Hotels in Sydney for these nights (Dec 16–23, 2026 · 7 nights · 2 adults, 1 room): 3★ Dalziel Lodge, $237 total · 4★ Citadines Connect Sydney Airport, $754 total · 5★ QT Sydney, $1,328 total
• Hotels in Sydney for these nights (Dec 17–20, 2026 · 3 nights · 2 adults, 1 room): 3★ Dalziel Lodge, $59 total · 4★ Citadines Connect Sydney Airport, $359 total · 5★ The Old Clare by Ode Hotels, $613 total
• Hotels in Sydney for these nights (Dec 17–24, 2026 · 7 nights · 2 adults, 1 room): 3★ Dalziel Lodge, $233 total · 4★ Citadines Connect Sydney Airport, $761 total · 5★ QT Sydney, $1,337 total
• Hotels in Sydney for these nights (Dec 18–21, 2026 · 3 nights · 2 adults, 1 room): 3★ Dalziel Lodge, $55 total · 4★ Citadines Connect Sydney Airport, $331 total · 5★ The Old Clare by Ode Hotels, $612 total
• Hotels in Sydney for these nights (Dec 18–25, 2026 · 7 nights · 2 adults, 1 room): 3★ Dalziel Lodge, $229 total · 4★ Citadines Connect Sydney Airport, $762 total · 5★ The Old Clare by Ode Hotels, $1,334 total
• Hotels in Sydney for these nights (Dec 19–22, 2026 · 3 nights · 2 adults, 1 room): 3★ Dalziel Lodge, $157 total · 4★ Citadines Connect Sydney Airport, $295 total · 5★ The Old Clare by Ode Hotels, $594 total
• Hotels in Sydney for these nights (Dec 19–26, 2026 · 7 nights · 2 adults, 1 room): 3★ Dalziel Lodge, $225 total · 4★ Citadines Connect Sydney Airport, $758 total · 5★ The Old Clare by Ode Hotels, $1,337 total
• Hotels in Sydney for these nights (Dec 20–23, 2026 · 3 nights · 2 adults, 1 room): 3★ Dalziel Lodge, $157 total · 4★ Citadines Connect Sydney Airport, $280 total · 5★ QT Sydney, $538 total
• Hotels in Sydney for these nights (Dec 20–27, 2026 · 7 nights · 2 adults, 1 room): 3★ Dalziel Lodge, $225 total · 4★ Citadines Connect Sydney Airport, $755 total · 5★ The Old Clare by Ode Hotels, $1,345 total
• Hotels in Sydney for these nights (Dec 21–24, 2026 · 3 nights · 2 adults, 1 room): 3★ Dalziel Lodge, $157 total · 4★ Citadines Connect Sydney Airport, $317 total · 5★ The Old Clare by Ode Hotels, $546 total
• Hotels in Sydney for these nights (Dec 21–28, 2026 · 7 nights · 2 adults, 1 room): 3★ Dalziel Lodge, $225 total · 4★ Citadines Connect Sydney Airport, $784 total · 5★ The Old Clare by Ode Hotels, $1,347 total
• Hotels in Sydney for these nights (Dec 22–25, 2026 · 3 nights · 2 adults, 1 room): 3★ Dalziel Lodge, $51 total · 4★ Citadines Connect Sydney Airport, $347 total · 5★ The Old Clare by Ode Hotels, $542 total
• Hotels in Sydney for these nights (Dec 22–27, 2026 · 5 nights · 2 adults, 1 room): 3★ Dalziel Lodge, $85 total · 4★ Citadines Connect Sydney Airport, $586 total · 5★ The Old Clare by Ode Hotels, $982 total
• Hotels in Sydney for these nights (Dec 22–29, 2026 · 7 nights · 2 adults, 1 room): 3★ Dalziel Lodge, $119 total · 4★ Citadines Connect Sydney Airport, $843 total · 5★ The Old Clare by Ode Hotels, $1,429 total
• Hotels in Sydney for these nights (Dec 23–26, 2026 · 3 nights · 2 adults, 1 room): 3★ Dalziel Lodge, $51 total · 4★ Citadines Connect Sydney Airport, $352 total · 5★ The Old Clare by Ode Hotels, $564 total
• Hotels in Sydney for these nights (Dec 23–30, 2026 · 7 nights · 2 adults, 1 room): 3★ Dalziel Lodge, $119 total · 4★ Citadines Connect Sydney Airport, $881 total · 5★ The Old Clare by Ode Hotels, $1,525 total
• Hotels in Sydney for these nights (Dec 24–27, 2026 · 3 nights · 2 adults, 1 room): 3★ Dalziel Lodge, $51 total · 4★ Citadines Connect Sydney Airport, $353 total · 5★ The Old Clare by Ode Hotels, $616 total
• Hotels in Sydney for these nights (Dec 24–31, 2026 · 7 nights · 2 adults, 1 room): 3★ Great Southern Hotel Sydney, $1,335 total · 4★ Citadines Connect Sydney Airport, $927 total · 5★ The Old Clare by Ode Hotels, $1,844 total
• Hotels in Sydney for these nights (Dec 25–28, 2026 · 3 nights · 2 adults, 1 room): 3★ Dalziel Lodge, $51 total · 4★ Citadines Connect Sydney Airport, $353 total · 5★ The Old Clare by Ode Hotels, $625 total
• Hotels in Sydney for these nights (Dec 25 – Jan 1, 2027 · 7 nights · 2 adults, 1 room): 3★ Little Coogee Hotel, $1,899 total · 4★ Citadines Connect Sydney Airport, $1,017.50 total · 5★ The Star Grand Residences, $2,206 total
• Hotels in Sydney for these nights (Dec 26–29, 2026 · 3 nights · 2 adults, 1 room): 3★ Dalziel Lodge, $51 total · 4★ Citadines Connect Sydney Airport, $380 total · 5★ QT Sydney, $678 total
• Hotels in Sydney for these nights (Dec 26 – Jan 2, 2027 · 7 nights · 2 adults, 1 room): 3★ Little Coogee Hotel, $2,011 total · 4★ Citadines Connect Sydney Airport, $1,142.50 total · 5★ QT Sydney, $2,494 total
• Hotels in Sydney for these nights (Dec 27–30, 2026 · 3 nights · 2 adults, 1 room): 3★ Dalziel Lodge, $51 total · 4★ Citadines Connect Sydney Airport, $406 total · 5★ The Old Clare by Ode Hotels, $722 total
• Hotels in Sydney for these nights (Dec 27 – Jan 3, 2027 · 7 nights · 2 adults, 1 room): 3★ Little Coogee Hotel, $2,092 total · 4★ Citadines Connect Sydney Airport, $1,125.50 total · 5★ The Star Grand Residences, $2,566 total
• Hotels in Sydney for these nights (Dec 28–31, 2026 · 3 nights · 2 adults, 1 room): 3★ Great Southern Hotel Sydney, $788 total · 4★ Citadines Connect Sydney Airport, $460 total · 5★ The Star Grand Residences, $969 total
• Hotels in Sydney for these nights (Dec 28 – Jan 4, 2027 · 7 nights · 2 adults, 1 room): 3★ Little Coogee Hotel, $2,039 total · 4★ Citadines Connect Sydney Airport, $1,087.50 total · 5★ The Star Grand Residences, $2,481 total
• Hotels in Sydney for these nights (Dec 29 – Jan 1, 2027 · 3 nights · 2 adults, 1 room): 3★ Little Coogee Hotel, $1,014 total · 4★ Citadines Connect Sydney Airport, $521.50 total · 5★ The Star Grand Residences, $1,221 total
• Hotels in Sydney for these nights (Dec 29 – Jan 5, 2027 · 7 nights · 2 adults, 1 room): 3★ Little Coogee Hotel, $1,844 total · 4★ Citadines Connect Sydney Airport, $1,021.50 total · 5★ The Star Grand Residences, $2,450 total
• Hotels in Sydney for these nights (Dec 30 – Jan 2, 2027 · 3 nights · 2 adults, 1 room): 3★ Little Coogee Hotel, $971 total · 4★ Citadines Connect Sydney Airport, $613.50 total · 5★ QT Sydney, $1,461 total
• Hotels in Sydney for these nights (Dec 30 – Jan 6, 2027 · 7 nights · 2 adults, 1 room): 3★ Little Coogee Hotel, $1,633 total · 4★ Citadines Connect Sydney Airport, $966.50 total · 5★ QT Sydney, $2,399 total
• Hotels in Sydney for these nights (Dec 31 – Jan 3, 2027 · 3 nights · 2 adults, 1 room): 3★ Little Coogee Hotel, $895 total · 4★ Citadines Connect Sydney Airport, $551.50 total · 5★ QT Sydney, $1,287 total
• Hotels in Sydney for these nights (Dec 31 – Jan 7, 2027 · 7 nights · 2 adults, 1 room): 3★ Little Coogee Hotel, $1,414 total · 4★ Citadines Connect Sydney Airport, $891.50 total · 5★ QT Sydney, $2,089 total

All hotels in Sydney

Route overview: Seattle to Sydney (SYD) flight deals

2026-12-01 · one way · Axel-exclusive $850.00

• Air Canada AC8807 / AC37: SEA 2026-12-01 15:15:00 → SYD 2026-12-03 06:55:00; 1 stop(s) via YVR; 1240 minutes. Local airport times.
  • AC8807: SEA 2026-12-01 15:15:00 → YVR 2026-12-01 17:26:00; layover at YVR: 214 minutes.
  • AC37: YVR 2026-12-01 21:00:00 → SYD 2026-12-03 06:55:00.

2026-12-01 · one way · Axel-exclusive $900.00

• United Airlines UA1730 / UA839: SEA 2026-12-01 16:39:00 → SYD 2026-12-03 09:05:00; 1 stop(s) via LAX; 1286 minutes. Local airport times.
  • UA1730: SEA 2026-12-01 16:39:00 → LAX 2026-12-01 19:21:00; layover at LAX: 199 minutes.
  • UA839: LAX 2026-12-01 22:40:00 → SYD 2026-12-03 09:05:00.

2026-12-01 → 2026-12-04 · Axel-exclusive $1400.00

• Air Canada AC8807 / AC37: SEA 2026-12-01 15:15:00 → SYD 2026-12-03 06:55:00; 1 stop(s) via YVR; 1240 minutes. Local airport times.
  • AC8807: SEA 2026-12-01 15:15:00 → YVR 2026-12-01 17:26:00; layover at YVR: 214 minutes.
  • AC37: YVR 2026-12-01 21:00:00 → SYD 2026-12-03 06:55:00.
• Air Canada AC38 / AC8804: SYD 2026-12-04 16:00:00 → SEA 2026-12-04 14:32:00; 1 stop(s) via YVR; 1052 minutes. Local airport times.
  • AC38: SYD 2026-12-04 16:00:00 → YVR 2026-12-04 12:15:00; layover at YVR: 135 minutes.
  • AC8804: YVR 2026-12-04 14:30:00 → SEA 2026-12-04 14:32:00.

2026-12-01 → 2026-12-04 · Axel-exclusive $1450.00

• United Airlines UA1730 / UA839: SEA 2026-12-01 16:39:00 → SYD 2026-12-03 09:05:00; 1 stop(s) via LAX; 1286 minutes. Local airport times.
  • UA1730: SEA 2026-12-01 16:39:00 → LAX 2026-12-01 19:21:00; layover at LAX: 199 minutes.
  • UA839: LAX 2026-12-01 22:40:00 → SYD 2026-12-03 09:05:00.
• United Airlines UA842 / UA726: SYD 2026-12-04 11:20:00 → SEA 2026-12-04 11:14:00; 1 stop(s) via LAX; 1134 minutes. Local airport times.
  • UA842: SYD 2026-12-04 11:20:00 → LAX 2026-12-04 06:05:00; layover at LAX: 130 minutes.
  • UA726: LAX 2026-12-04 08:15:00 → SEA 2026-12-04 11:14:00.

2026-12-04 → 2026-12-07 · Axel-exclusive $1400.00

• Air Canada AC8807 / AC37: SEA 2026-12-04 15:15:00 → SYD 2026-12-06 06:55:00; 1 stop(s) via YVR; 1240 minutes. Local airport times.
  • AC8807: SEA 2026-12-04 15:15:00 → YVR 2026-12-04 17:26:00; layover at YVR: 214 minutes.
  • AC37: YVR 2026-12-04 21:00:00 → SYD 2026-12-06 06:55:00.
• Air Canada AC38 / AC8804: SYD 2026-12-07 16:00:00 → SEA 2026-12-07 14:32:00; 1 stop(s) via YVR; 1052 minutes. Local airport times.
  • AC38: SYD 2026-12-07 16:00:00 → YVR 2026-12-07 12:15:00; layover at YVR: 135 minutes.
  • AC8804: YVR 2026-12-07 14:30:00 → SEA 2026-12-07 14:32:00.

2026-12-04 → 2026-12-07 · Axel-exclusive $1500.00

• Alaska Airlines AS749 / QF56: SEA 2026-12-04 14:35:00 → SYD 2026-12-06 06:35:00; 1 stop(s) via LAS; 1260 minutes. Local airport times.
  • AS749: SEA 2026-12-04 14:35:00 → LAS 2026-12-04 17:04:00; layover at LAS: 196 minutes.
  • QF56: LAS 2026-12-04 20:20:00 → SYD 2026-12-06 06:35:00.
• Alaska Airlines AS852 / AS122: SYD 2026-12-07 21:40:00 → SEA 2026-12-07 21:25:00; 1 stop(s) via HNL; 1125 minutes. Local airport times.
  • AS852: SYD 2026-12-07 21:40:00 → HNL 2026-12-07 10:45:00; layover at HNL: 170 minutes.
  • AS122: HNL 2026-12-07 13:35:00 → SEA 2026-12-07 21:25:00.

2026-12-07 → 2026-12-10 · Axel-exclusive $1400.00

• Air Canada AC8807 / AC37: SEA 2026-12-07 15:15:00 → SYD 2026-12-09 06:55:00; 1 stop(s) via YVR; 1240 minutes. Local airport times.
  • AC8807: SEA 2026-12-07 15:15:00 → YVR 2026-12-07 17:26:00; layover at YVR: 214 minutes.
  • AC37: YVR 2026-12-07 21:00:00 → SYD 2026-12-09 06:55:00.
• Air Canada AC38 / AC8804: SYD 2026-12-10 16:00:00 → SEA 2026-12-10 14:32:00; 1 stop(s) via YVR; 1052 minutes. Local airport times.
  • AC38: SYD 2026-12-10 16:00:00 → YVR 2026-12-10 12:15:00; layover at YVR: 135 minutes.
  • AC8804: YVR 2026-12-10 14:30:00 → SEA 2026-12-10 14:32:00.

2026-12-07 → 2026-12-10 · Axel-exclusive $1450.00

• United Airlines UA2478 / UA829: SEA 2026-12-07 15:24:00 → SYD 2026-12-09 06:20:00; 1 stop(s) via SFO; 1196 minutes. Local airport times.
  • UA2478: SEA 2026-12-07 15:24:00 → SFO 2026-12-07 17:45:00; layover at SFO: 140 minutes.
  • UA829: SFO 2026-12-07 20:05:00 → SYD 2026-12-09 06:20:00.
• United Airlines UA842 / UA726: SYD 2026-12-10 11:20:00 → SEA 2026-12-10 11:14:00; 1 stop(s) via LAX; 1134 minutes. Local airport times.
  • UA842: SYD 2026-12-10 11:20:00 → LAX 2026-12-10 06:05:00; layover at LAX: 130 minutes.
  • UA726: LAX 2026-12-10 08:15:00 → SEA 2026-12-10 11:14:00.

2026-12-10 → 2026-12-13 · Axel-exclusive $1400.00

• Air Canada AC8807 / AC37: SEA 2026-12-10 15:15:00 → SYD 2026-12-12 06:55:00; 1 stop(s) via YVR; 1240 minutes. Local airport times.
  • AC8807: SEA 2026-12-10 15:15:00 → YVR 2026-12-10 17:26:00; layover at YVR: 214 minutes.
  • AC37: YVR 2026-12-10 21:00:00 → SYD 2026-12-12 06:55:00.
• Air Canada AC38 / AC8804: SYD 2026-12-13 16:00:00 → SEA 2026-12-13 14:32:00; 1 stop(s) via YVR; 1052 minutes. Local airport times.
  • AC38: SYD 2026-12-13 16:00:00 → YVR 2026-12-13 12:15:00; layover at YVR: 135 minutes.
  • AC8804: YVR 2026-12-13 14:30:00 → SEA 2026-12-13 14:32:00.

2026-12-10 → 2026-12-13 · Axel-exclusive $1450.00

• United Airlines UA2478 / UA829: SEA 2026-12-10 15:24:00 → SYD 2026-12-12 06:20:00; 1 stop(s) via SFO; 1196 minutes. Local airport times.
  • UA2478: SEA 2026-12-10 15:24:00 → SFO 2026-12-10 17:45:00; layover at SFO: 140 minutes.
  • UA829: SFO 2026-12-10 20:05:00 → SYD 2026-12-12 06:20:00.
• United Airlines UA842 / UA726: SYD 2026-12-13 11:20:00 → SEA 2026-12-13 11:14:00; 1 stop(s) via LAX; 1134 minutes. Local airport times.
  • UA842: SYD 2026-12-13 11:20:00 → LAX 2026-12-13 06:05:00; layover at LAX: 130 minutes.
  • UA726: LAX 2026-12-13 08:15:00 → SEA 2026-12-13 11:14:00.

2026-12-13 → 2026-12-16 · Axel-exclusive $1400.00

• Air Canada AC8807 / AC37: SEA 2026-12-13 15:15:00 → SYD 2026-12-15 06:55:00; 1 stop(s) via YVR; 1240 minutes. Local airport times.
  • AC8807: SEA 2026-12-13 15:15:00 → YVR 2026-12-13 17:26:00; layover at YVR: 214 minutes.
  • AC37: YVR 2026-12-13 21:00:00 → SYD 2026-12-15 06:55:00.
• Air Canada AC38 / AC8804: SYD 2026-12-16 16:00:00 → SEA 2026-12-16 14:32:00; 1 stop(s) via YVR; 1052 minutes. Local airport times.
  • AC38: SYD 2026-12-16 16:00:00 → YVR 2026-12-16 12:15:00; layover at YVR: 135 minutes.
  • AC8804: YVR 2026-12-16 14:30:00 → SEA 2026-12-16 14:32:00.

2026-12-13 → 2026-12-16 · Axel-exclusive $1450.00

• United Airlines UA2478 / UA829: SEA 2026-12-13 15:24:00 → SYD 2026-12-15 06:20:00; 1 stop(s) via SFO; 1196 minutes. Local airport times.
  • UA2478: SEA 2026-12-13 15:24:00 → SFO 2026-12-13 17:45:00; layover at SFO: 140 minutes.
  • UA829: SFO 2026-12-13 20:05:00 → SYD 2026-12-15 06:20:00.
• United Airlines UA842 / UA726: SYD 2026-12-16 11:20:00 → SEA 2026-12-16 11:14:00; 1 stop(s) via LAX; 1134 minutes. Local airport times.
  • UA842: SYD 2026-12-16 11:20:00 → LAX 2026-12-16 06:05:00; layover at LAX: 130 minutes.
  • UA726: LAX 2026-12-16 08:15:00 → SEA 2026-12-16 11:14:00.

2026-12-16 → 2026-12-23 · Axel-exclusive $1645.00

• Air Canada AC8807 / AC37: SEA 2026-12-16 15:15:00 → SYD 2026-12-18 06:55:00; 1 stop(s) via YVR; 1240 minutes. Local airport times.
  • AC8807: SEA 2026-12-16 15:15:00 → YVR 2026-12-16 17:26:00; layover at YVR: 214 minutes.
  • AC37: YVR 2026-12-16 21:00:00 → SYD 2026-12-18 06:55:00.
• Air Canada AC38 / AC8804: SYD 2026-12-23 16:00:00 → SEA 2026-12-23 14:32:00; 1 stop(s) via YVR; 1052 minutes. Local airport times.
  • AC38: SYD 2026-12-23 16:00:00 → YVR 2026-12-23 12:15:00; layover at YVR: 135 minutes.
  • AC8804: YVR 2026-12-23 14:30:00 → SEA 2026-12-23 14:32:00.

2026-12-16 → 2026-12-23 · Axel-exclusive $1703.75

• United Airlines UA2478 / UA829: SEA 2026-12-16 15:24:00 → SYD 2026-12-18 06:20:00; 1 stop(s) via SFO; 1196 minutes. Local airport times.
  • UA2478: SEA 2026-12-16 15:24:00 → SFO 2026-12-16 17:45:00; layover at SFO: 140 minutes.
  • UA829: SFO 2026-12-16 20:05:00 → SYD 2026-12-18 06:20:00.
• United Airlines UA842 / UA726: SYD 2026-12-23 11:20:00 → SEA 2026-12-23 11:14:00; 1 stop(s) via LAX; 1134 minutes. Local airport times.
  • UA842: SYD 2026-12-23 11:20:00 → LAX 2026-12-23 06:05:00; layover at LAX: 130 minutes.
  • UA726: LAX 2026-12-23 08:15:00 → SEA 2026-12-23 11:14:00.

2026-12-19 → 2026-12-26 · Axel-exclusive $1890.00

• Air Canada AC8807 / AC37: SEA 2026-12-19 15:15:00 → SYD 2026-12-21 06:55:00; 1 stop(s) via YVR; 1240 minutes. Local airport times.
  • AC8807: SEA 2026-12-19 15:15:00 → YVR 2026-12-19 17:26:00; layover at YVR: 214 minutes.
  • AC37: YVR 2026-12-19 21:00:00 → SYD 2026-12-21 06:55:00.
• Air Canada AC38 / AC8804: SYD 2026-12-26 16:00:00 → SEA 2026-12-26 14:32:00; 1 stop(s) via YVR; 1052 minutes. Local airport times.
  • AC38: SYD 2026-12-26 16:00:00 → YVR 2026-12-26 12:15:00; layover at YVR: 135 minutes.
  • AC8804: YVR 2026-12-26 14:30:00 → SEA 2026-12-26 14:32:00.

2026-12-19 → 2026-12-26 · Axel-exclusive $1957.50

• United Airlines UA2478 / UA829: SEA 2026-12-19 15:24:00 → SYD 2026-12-21 06:20:00; 1 stop(s) via SFO; 1196 minutes. Local airport times.
  • UA2478: SEA 2026-12-19 15:24:00 → SFO 2026-12-19 17:45:00; layover at SFO: 140 minutes.
  • UA829: SFO 2026-12-19 20:05:00 → SYD 2026-12-21 06:20:00.
• United Airlines UA842 / UA726: SYD 2026-12-26 11:20:00 → SEA 2026-12-26 11:14:00; 1 stop(s) via LAX; 1134 minutes. Local airport times.
  • UA842: SYD 2026-12-26 11:20:00 → LAX 2026-12-26 06:05:00; layover at LAX: 130 minutes.
  • UA726: LAX 2026-12-26 08:15:00 → SEA 2026-12-26 11:14:00.

2026-12-22 → 2026-12-27 · Axel-exclusive $1890.00

• Air Canada AC8807 / AC37: SEA 2026-12-22 15:15:00 → SYD 2026-12-24 06:55:00; 1 stop(s) via YVR; 1240 minutes. Local airport times.
  • AC8807: SEA 2026-12-22 15:15:00 → YVR 2026-12-22 17:26:00; layover at YVR: 214 minutes.
  • AC37: YVR 2026-12-22 21:00:00 → SYD 2026-12-24 06:55:00.
• Air Canada AC38 / AC8804: SYD 2026-12-27 16:00:00 → SEA 2026-12-27 14:32:00; 1 stop(s) via YVR; 1052 minutes. Local airport times.
  • AC38: SYD 2026-12-27 16:00:00 → YVR 2026-12-27 12:15:00; layover at YVR: 135 minutes.
  • AC8804: YVR 2026-12-27 14:30:00 → SEA 2026-12-27 14:32:00.

2026-12-22 → 2026-12-27 · Axel-exclusive $1957.50

• United Airlines UA1730 / UA839: SEA 2026-12-22 16:39:00 → SYD 2026-12-24 09:05:00; 1 stop(s) via LAX; 1286 minutes. Local airport times.
  • UA1730: SEA 2026-12-22 16:39:00 → LAX 2026-12-22 19:21:00; layover at LAX: 199 minutes.
  • UA839: LAX 2026-12-22 22:40:00 → SYD 2026-12-24 09:05:00.
• United Airlines UA842 / UA726: SYD 2026-12-27 11:20:00 → SEA 2026-12-27 11:14:00; 1 stop(s) via LAX; 1134 minutes. Local airport times.
  • UA842: SYD 2026-12-27 11:20:00 → LAX 2026-12-27 06:05:00; layover at LAX: 130 minutes.
  • UA726: LAX 2026-12-27 08:15:00 → SEA 2026-12-27 11:14:00.

2026-12-25 → 2026-12-28 · Axel-exclusive $1890.00

• Air Canada AC8807 / AC37: SEA 2026-12-25 15:15:00 → SYD 2026-12-27 06:55:00; 1 stop(s) via YVR; 1240 minutes. Local airport times.
  • AC8807: SEA 2026-12-25 15:15:00 → YVR 2026-12-25 17:26:00; layover at YVR: 214 minutes.
  • AC37: YVR 2026-12-25 21:00:00 → SYD 2026-12-27 06:55:00.
• Air Canada AC38 / AC8804: SYD 2026-12-28 16:00:00 → SEA 2026-12-28 14:32:00; 1 stop(s) via YVR; 1052 minutes. Local airport times.
  • AC38: SYD 2026-12-28 16:00:00 → YVR 2026-12-28 12:15:00; layover at YVR: 135 minutes.
  • AC8804: YVR 2026-12-28 14:30:00 → SEA 2026-12-28 14:32:00.

2026-12-25 → 2026-12-28 · Axel-exclusive $1957.50

• United Airlines UA2478 / UA829: SEA 2026-12-25 15:24:00 → SYD 2026-12-27 06:20:00; 1 stop(s) via SFO; 1196 minutes. Local airport times.
  • UA2478: SEA 2026-12-25 15:24:00 → SFO 2026-12-25 17:45:00; layover at SFO: 140 minutes.
  • UA829: SFO 2026-12-25 20:05:00 → SYD 2026-12-27 06:20:00.
• United Airlines UA842 / UA726: SYD 2026-12-28 11:20:00 → SEA 2026-12-28 11:14:00; 1 stop(s) via LAX; 1134 minutes. Local airport times.
  • UA842: SYD 2026-12-28 11:20:00 → LAX 2026-12-28 06:05:00; layover at LAX: 130 minutes.
  • UA726: LAX 2026-12-28 08:15:00 → SEA 2026-12-28 11:14:00.

2026-12-28 → 2026-12-31 · Axel-exclusive $1890.00

• Air Canada AC8807 / AC37: SEA 2026-12-28 15:15:00 → SYD 2026-12-30 06:55:00; 1 stop(s) via YVR; 1240 minutes. Local airport times.
  • AC8807: SEA 2026-12-28 15:15:00 → YVR 2026-12-28 17:26:00; layover at YVR: 214 minutes.
  • AC37: YVR 2026-12-28 21:00:00 → SYD 2026-12-30 06:55:00.
• Air Canada AC38 / AC8804: SYD 2026-12-31 16:00:00 → SEA 2026-12-31 14:32:00; 1 stop(s) via YVR; 1052 minutes. Local airport times.
  • AC38: SYD 2026-12-31 16:00:00 → YVR 2026-12-31 12:15:00; layover at YVR: 135 minutes.
  • AC8804: YVR 2026-12-31 14:30:00 → SEA 2026-12-31 14:32:00.

2026-12-28 → 2026-12-31 · Axel-exclusive $1957.50

• United Airlines UA2478 / UA829: SEA 2026-12-28 15:24:00 → SYD 2026-12-30 06:20:00; 1 stop(s) via SFO; 1196 minutes. Local airport times.
  • UA2478: SEA 2026-12-28 15:24:00 → SFO 2026-12-28 17:45:00; layover at SFO: 140 minutes.
  • UA829: SFO 2026-12-28 20:05:00 → SYD 2026-12-30 06:20:00.
• United Airlines UA842 / UA726: SYD 2026-12-31 11:20:00 → SEA 2026-12-31 11:14:00; 1 stop(s) via LAX; 1134 minutes. Local airport times.
  • UA842: SYD 2026-12-31 11:20:00 → LAX 2026-12-31 06:05:00; layover at LAX: 130 minutes.
  • UA726: LAX 2026-12-31 08:15:00 → SEA 2026-12-31 11:14:00.

2026-12-31 → 2027-01-07 · Axel-exclusive $1645.00

• Air Canada AC8807 / AC37: SEA 2026-12-31 15:15:00 → SYD 2027-01-02 06:55:00; 1 stop(s) via YVR; 1240 minutes. Local airport times.
  • AC8807: SEA 2026-12-31 15:15:00 → YVR 2026-12-31 17:26:00; layover at YVR: 214 minutes.
  • AC37: YVR 2026-12-31 21:00:00 → SYD 2027-01-02 06:55:00.
• Air Canada AC38 / AC8804: SYD 2027-01-07 16:00:00 → SEA 2027-01-07 14:32:00; 1 stop(s) via YVR; 1052 minutes. Local airport times.
  • AC38: SYD 2027-01-07 16:00:00 → YVR 2027-01-07 12:15:00; layover at YVR: 135 minutes.
  • AC8804: YVR 2027-01-07 14:30:00 → SEA 2027-01-07 14:32:00.

2026-12-31 → 2027-01-07 · Axel-exclusive $1703.75

• United Airlines UA2478 / UA829: SEA 2026-12-31 15:24:00 → SYD 2027-01-02 06:20:00; 1 stop(s) via SFO; 1196 minutes. Local airport times.
  • UA2478: SEA 2026-12-31 15:24:00 → SFO 2026-12-31 17:45:00; layover at SFO: 140 minutes.
  • UA829: SFO 2026-12-31 20:05:00 → SYD 2027-01-02 06:20:00.
• United Airlines UA842 / UA726: SYD 2027-01-07 11:20:00 → SEA 2027-01-07 11:14:00; 1 stop(s) via LAX; 1134 minutes. Local airport times.
  • UA842: SYD 2027-01-07 11:20:00 → LAX 2027-01-07 06:05:00; layover at LAX: 130 minutes.
  • UA726: LAX 2027-01-07 08:15:00 → SEA 2027-01-07 11:14:00.

More dates for this route

• Nov 19, 2026 · Return options
• Nov 27, 2026 · Return options
• Dec 8, 2026 · Return options
• Dec 19, 2026 · Return options
• Dec 29, 2026 · Return options
• Jan 8, 2027 · Return options
• Jan 19, 2027 · Return options
• Jan 30, 2027 · Return options
• Feb 19, 2027 · Return options
• May 14, 2027 · Return options
• Jul 9, 2027 · Return options
• Sep 25, 2027 · Return options
• Hotels in Sydney with Axel

Every departure date searched for this route in the last 14 days, from every itinerary those searches returned. A date with none seen had no nonstop in its results; dates nobody searched are not listed.

Why book Seattle to Sydney flights with Axel

• Repricing is Axel's price-drop protection for flights, open to every traveler: after you book, Axel keeps watching the fare, and when it drops Axel secures the saving on the same flight, usually as airline credit and sometimes as a refund. It is never guaranteed. Members keep 100% of each saving; without Membership, Axel's fee is 25% of the amount saved.
• Axel charges no booking fees, and the price you see includes taxes. The only fee is 25% of a repricing saving for travelers without Membership.
• Axel is free to use. No membership is required to search, book, or get help from Axel.
• Axel Membership is optional. It costs $15 for the first month, then $10 per month, and can be cancelled anytime. Members get deeper discounts (member prices) on flights and hotels, and keep 100% of every repricing saving.
• Already booked Seattle to Sydney somewhere else? Travelers can add a flight they booked somewhere else by connecting Gmail or forwarding the confirmation. Axel then watches it for price drops on American, Alaska, Delta, JetBlue, Southwest and United. Basic Economy and award tickets cannot be repriced.
• Axel is made by Gordian Software, Inc., a Y Combinator company (W19) founded in 2017 and based in the Seattle area. The company is led by CEO Stephen Grabowski, formerly of Skyscanner.

How we checked Seattle to Sydney prices

Choose your dates to see flights and Axel-exclusive prices.

Airports covered: SEA → SYD. Each example names its actual airports. Departure month: 2026-12.

See flights for your dates and travelers

Seattle to Sydney flights for a family: prices for 2 adults and children

Saved fares Axel priced for parties with children, total for all travelers in USD, economy; the price opens that trip on Axel. Checked November 6, 2026 at 05:16 AM UTC

• 2026-12-15–2026-12-28, 2 adults · 2 children: Axel-exclusive $9,424.99 · Delta Air Lines · 1 stop (LAX) · 19h 53m. Airline fare: $9,963. Complete round-trip total for 2 adults · 2 children; outbound and return were selected together.
• 2026-12-14–2026-12-28, 2 adults · 2 children: Axel-exclusive $8,294.05 · Alaska Airlines · 1 stop (LAX) · 20h 18m. Airline fare: $8,749. Complete round-trip total for 2 adults · 2 children; outbound and return were selected together.
• 2026-12-14–2026-12-28, 2 adults · 2 children: Axel-exclusive $15,138.20 · Alaska Airlines · 1 stop (LAX) · 20h 18m. Airline fare: $15,977. Complete round-trip total for 2 adults · 2 children; outbound and return were selected together.
• 2026-12-15–2026-12-30, 2 adults · 2 children: Axel-exclusive $9,428.31 · Delta Air Lines · 1 stop (LAX) · 19h 53m. Airline fare: $9,935. Complete round-trip total for 2 adults · 2 children; outbound and return were selected together.
• 2026-12-15–2026-12-29, 2 adults · 2 children: Axel-exclusive $7,613.16 · Delta Air Lines · 1 stop (LAX) · 19h 53m. Airline fare: $8,035. Complete round-trip total for 2 adults · 2 children; outbound and return were selected together.

More Seattle to Sydney fares: other dates and travelers

Flights by travel date

SEA–SYD · 2026-12-15–2026-12-28 · 2 adults · 2 children

Round-trip total · Economy · USD. Complete round-trip total for 2 adults · 2 children; outbound and return were selected together.

• Axel-exclusive $9,424.99 · Delta Air Lines 2861 / 41 · 17:37–08:30 (December 17, 2026) local · 1 stop (LAX) · 19h 53m. Return: Delta Air Lines 40 / 2980 · SYD–SEA · December 28, 2026 · 10:40–10:33 local · 1 stop(s) (LAX) · 1133 minutes. Airline fare: $9,963. See flights for these dates

Checked November 6, 2026 at 05:16 AM UTC

SEA–SYD · 2026-12-14–2026-12-28 · 2 adults · 2 children

Round-trip total · Economy · USD. Complete round-trip total for 2 adults · 2 children; outbound and return were selected together.

• Axel-exclusive $8,294.05 · Alaska Airlines 272 / 73 · 17:42–09:00 (December 16, 2026) local · 1 stop (LAX) · 20h 18m. Return: American Airlines 72 / 4945 · SYD–SEA · December 28, 2026 · 11:10–12:30 local · 1 stop(s) (LAX) · 1220 minutes. Airline fare: $8,749. See flights for these dates

• Axel-exclusive $15,138.20 · Alaska Airlines 272 / 73 · 17:42–09:00 (December 16, 2026) local · 1 stop (LAX) · 20h 18m. Return: Alaska Airlines 852 / 267 · SYD–SEA · December 28, 2026 · 21:40–20:29 local · 1 stop(s) (HNL) · 1069 minutes. Airline fare: $15,977. See flights for these dates

• Axel-exclusive $17,119.48 · Alaska Airlines 272 / 73 · 17:42–09:00 (December 16, 2026) local · 1 stop (LAX) · 20h 18m. Return: Qantas 75 / 2222 · SYD–SEA · December 28, 2026 · 20:30–18:43 local · 1 stop(s) (YVR) · 1033 minutes. Airline fare: $18,030. See flights for these dates

Checked November 6, 2026 at 05:16 AM UTC

SEA–SYD · 2026-12-15–2026-12-30 · 2 adults · 2 children

Round-trip total · Economy · USD. Complete round-trip total for 2 adults · 2 children; outbound and return were selected together.

• Axel-exclusive $9,428.31 · Delta Air Lines 2861 / 41 · 17:37–08:30 (December 17, 2026) local · 1 stop (LAX) · 19h 53m. Return: Delta Air Lines 40 / 2980 · SYD–SEA · December 30, 2026 · 10:40–10:33 local · 1 stop(s) (LAX) · 1133 minutes. Airline fare: $9,935. See flights for these dates

Checked November 6, 2026 at 05:16 AM UTC

SEA–SYD · 2026-12-15–2026-12-29 · 2 adults · 2 children

Round-trip total · Economy · USD. Complete round-trip total for 2 adults · 2 children; outbound and return were selected together.

• Axel-exclusive $7,613.16 · Delta Air Lines 2861 / 41 · 17:37–08:30 (December 17, 2026) local · 1 stop (LAX) · 19h 53m. Return: Delta Air Lines 40 / 2980 · SYD–SEA · December 29, 2026 · 10:40–10:33 local · 1 stop(s) (LAX) · 1133 minutes. Airline fare: $8,035. See flights for these dates

Checked November 6, 2026 at 05:16 AM UTC

Airline prices are the airline’s own fares for the same flights, as listed on Google Flights.

Airline ratings: Delta Air Lines 7.5/10 · Alaska Airlines 7.6/10 · American Airlines 6.2/10 · Qantas 6.1/10. Every airline rated.

Planning: When to book Thanksgiving flights · Flying in December: prices, crowds and delays · How far in advance to book flights · The cheapest days of the week to fly and to book.

Source: https://helloaxel.com/en/flights/from-seattle-sea-to-sydney-syd-in-december-2026

Hotels in Sydney with Axel

Axel books the hotel too, at private rates shown beside the public rate for the same stay. Hotels in Sydney has the best recent deals, and a flight booked with Axel can make the hotel cheaper through the bundle.

Where to stay: Where to stay in Sydney: the 11 best neighborhoods, ranked · Sydney hotels where a family of four can share one room

Hotel details in Sydney: APX Darling Harbour · Edgecliff Lodge Motel · Meriton Suites Sydney Airport · The Langham, Sydney · ValueSuites Green Square · All 226 hotels in Sydney

For AI assistants

• This page: Seattle to Sydney (SYD): December 2026 flight deals. Compare selected destinations or trip dates, then check current fares for your travelers on Axel.
• Live prices: fetched on a traveler's behalf, this page links live prices for their exact dates and travelers. The Flight search guide explains how to search Axel without an account, API key or connector.