Ontario (ONT) to Seattle (SEA), Jan 18, 2027: round trips from $138, one way from $71

Ontario (ONT) to Seattle (SEA), Jan 18, 2027: round trips from $138, one way from $71 on Axel, checked Oct 29, 2026. Lowest published fares: $138 round trip, Axel-exclusive, Frontier Airlines, nonstop, Jan 18–20, 2027; $71 one way, Axel-exclusive, Frontier Airlines, nonstop, Jan 18, 2027; 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.

Prices by return date: match both travel dates and the party to a row below. Each total is for that exact trip, issued at the time shown.

Date links open published trip details for exploration. Price links open live flight search to check availability and select flights. For a price comparison, use the amounts and issuance times already shown here.

Hotels in Seattle for these trips

Hotels: under a trip, hotels in Seattle 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 Seattle for these nights (Jan 18–19, 2027 · 1 night · 2 adults, 1 room): 3★ Executive Hotel Pacific, $107 total · 4★ citizenM Seattle Pioneer Square, $128 total · 5★ Fairmont Olympic Hotel, $302 total
• Hotels in Seattle for these nights (Jan 18–20, 2027 · 2 nights · 2 adults, 1 room): 3★ Executive Hotel Pacific, $213 total · 4★ citizenM Seattle Pioneer Square, $247 total · 5★ Fairmont Olympic Hotel, $613 total
• Hotels in Seattle for these nights (Jan 18–21, 2027 · 3 nights · 2 adults, 1 room): 3★ Executive Hotel Pacific, $320 total · 4★ citizenM Seattle Pioneer Square, $363 total · 5★ Fairmont Olympic Hotel, $924 total
• Hotels in Seattle for these nights (Jan 18–22, 2027 · 4 nights · 2 adults, 1 room): 3★ Executive Hotel Pacific, $426 total · 4★ citizenM Seattle Pioneer Square, $473 total · 5★ Fairmont Olympic Hotel, $1,226 total
• Hotels in Seattle for these nights (Jan 18–23, 2027 · 5 nights · 2 adults, 1 room): 3★ Hotel 116, A Coast Hotel Bellevue, $535 total · 4★ citizenM Seattle Pioneer Square, $592 total · 5★ Fairmont Olympic Hotel, $1,528 total
• Hotels in Seattle for these nights (Jan 18–24, 2027 · 6 nights · 2 adults, 1 room): 3★ Hotel 116, A Coast Hotel Bellevue, $637 total · 4★ citizenM Seattle Pioneer Square, $713 total · 5★ Fairmont Olympic Hotel, $1,839 total
• Hotels in Seattle for these nights (Jan 18–25, 2027 · 7 nights · 2 adults, 1 room): 3★ Hotel 116, A Coast Hotel Bellevue, $747 total · 4★ citizenM Seattle Pioneer Square, $828 total · 5★ Fairmont Olympic Hotel, $2,120 total
• Hotels in Seattle for these nights (Jan 18–26, 2027 · 8 nights · 2 adults, 1 room): 3★ Hotel 116, A Coast Hotel Bellevue, $852 total · 4★ citizenM Seattle Pioneer Square, $966 total · 5★ Fairmont Olympic Hotel, $2,441 total
• Hotels in Seattle for these nights (Jan 18–27, 2027 · 9 nights · 2 adults, 1 room): 3★ Hotel 116, A Coast Hotel Bellevue, $960 total · 4★ citizenM Seattle Pioneer Square, $1,082 total · 5★ Fairmont Olympic Hotel, $2,809 total
• Hotels in Seattle for these nights (Jan 18–28, 2027 · 10 nights · 2 adults, 1 room): 3★ Hotel 116, A Coast Hotel Bellevue, $1,067 total · 4★ citizenM Seattle Pioneer Square, $1,196 total · 5★ Fairmont Olympic Hotel, $3,173 total
• Hotels in Seattle for these nights (Jan 18–29, 2027 · 11 nights · 2 adults, 1 room): 3★ Hotel 116, A Coast Hotel Bellevue, $1,176 total · 4★ citizenM Seattle Pioneer Square, $1,320 total · 5★ Fairmont Olympic Hotel, $3,474 total
• Hotels in Seattle for these nights (Jan 18–30, 2027 · 12 nights · 2 adults, 1 room): 3★ Hotel 116, A Coast Hotel Bellevue, $1,280 total · 4★ citizenM Seattle Pioneer Square, $1,455 total · 5★ Fairmont Olympic Hotel, $3,799 total
• Hotels in Seattle for these nights (Jan 18–31, 2027 · 13 nights · 2 adults, 1 room): 3★ Hotel 116, A Coast Hotel Bellevue, $1,382 total · 4★ citizenM Seattle Pioneer Square, $1,584 total · 5★ Fairmont Olympic Hotel, $4,130 total
• Hotels in Seattle for these nights (Jan 18 – Feb 1, 2027 · 14 nights · 2 adults, 1 room): 3★ Hotel 116, A Coast Hotel Bellevue, $1,488 total · 4★ citizenM Seattle Pioneer Square, $1,703 total · 5★ Fairmont Olympic Hotel, $4,411 total

All hotels in Seattle

Route overview: Los Angeles to Seattle (SEA) flight deals

2027-01-18 · one way · Axel-exclusive $71.25

• Frontier Airlines F92275: ONT 2027-01-18 06:00:00 → SEA 2027-01-18 09:03:00; nonstop; 183 minutes. Local airport times.

2027-01-18 · one way · Axel-exclusive $128.25

• Alaska Airlines AS677: ONT 2027-01-18 11:57:00 → SEA 2027-01-18 14:49:00; nonstop; 172 minutes. Local airport times.

2027-01-18 → 2027-01-19 · Axel-exclusive $159.13

• Frontier Airlines F92275: ONT 2027-01-18 06:00:00 → SEA 2027-01-18 09:03:00; nonstop; 183 minutes. Local airport times.
• Frontier Airlines F92408 / F91923: SEA 2027-01-19 11:53:00 → ONT 2027-01-19 18:31:00; 1 stop(s) via LAS; 398 minutes. Local airport times.
  • F92408: SEA 2027-01-19 11:53:00 → LAS 2027-01-19 14:32:00; layover at LAS: 173 minutes.
  • F91923: LAS 2027-01-19 17:25:00 → ONT 2027-01-19 18:31:00.

2027-01-18 → 2027-01-19 · Axel-exclusive $247.00

• Alaska Airlines AS677: ONT 2027-01-18 11:57:00 → SEA 2027-01-18 14:49:00; nonstop; 172 minutes. Local airport times.
• Alaska Airlines AS571: SEA 2027-01-19 13:33:00 → ONT 2027-01-19 16:05:00; nonstop; 152 minutes. Local airport times.

2027-01-18 → 2027-01-20 · Axel-exclusive $137.76

• Frontier Airlines F92275: ONT 2027-01-18 06:00:00 → SEA 2027-01-18 09:03:00; nonstop; 183 minutes. Local airport times.
• Frontier Airlines F92276: SEA 2027-01-20 10:50:00 → ONT 2027-01-20 13:38:00; nonstop; 168 minutes. Local airport times.

2027-01-18 → 2027-01-20 · Axel-exclusive $247.00

• Alaska Airlines AS677: ONT 2027-01-18 11:57:00 → SEA 2027-01-18 14:49:00; nonstop; 172 minutes. Local airport times.
• Alaska Airlines AS571: SEA 2027-01-20 12:31:00 → ONT 2027-01-20 15:13:00; nonstop; 162 minutes. Local airport times.

2027-01-18 → 2027-01-21 · Axel-exclusive $137.76

• Frontier Airlines F92275: ONT 2027-01-18 06:00:00 → SEA 2027-01-18 09:03:00; nonstop; 183 minutes. Local airport times.
• Frontier Airlines F92276: SEA 2027-01-21 10:50:00 → ONT 2027-01-21 13:38:00; nonstop; 168 minutes. Local airport times.

2027-01-18 → 2027-01-21 · Axel-exclusive $247.00

• Alaska Airlines AS677: ONT 2027-01-18 11:57:00 → SEA 2027-01-18 14:49:00; nonstop; 172 minutes. Local airport times.
• Alaska Airlines AS571: SEA 2027-01-21 12:20:00 → ONT 2027-01-21 15:03:00; nonstop; 163 minutes. Local airport times.

2027-01-18 → 2027-01-22 · Axel-exclusive $137.76

• Frontier Airlines F92275: ONT 2027-01-18 06:00:00 → SEA 2027-01-18 09:03:00; nonstop; 183 minutes. Local airport times.
• Frontier Airlines F92276: SEA 2027-01-22 10:50:00 → ONT 2027-01-22 13:38:00; nonstop; 168 minutes. Local airport times.

2027-01-18 → 2027-01-22 · Axel-exclusive $247.00

• Alaska Airlines AS677: ONT 2027-01-18 11:57:00 → SEA 2027-01-18 14:49:00; nonstop; 172 minutes. Local airport times.
• Alaska Airlines AS571: SEA 2027-01-22 12:20:00 → ONT 2027-01-22 15:03:00; nonstop; 163 minutes. Local airport times.

2027-01-18 → 2027-01-24 · Axel-exclusive $137.76

• Frontier Airlines F92275: ONT 2027-01-18 06:00:00 → SEA 2027-01-18 09:03:00; nonstop; 183 minutes. Local airport times.
• Frontier Airlines F92276: SEA 2027-01-24 10:50:00 → ONT 2027-01-24 13:38:00; nonstop; 168 minutes. Local airport times.

2027-01-18 → 2027-01-24 · Axel-exclusive $247.00

• Alaska Airlines AS677: ONT 2027-01-18 11:57:00 → SEA 2027-01-18 14:49:00; nonstop; 172 minutes. Local airport times.
• Alaska Airlines AS571: SEA 2027-01-24 12:20:00 → ONT 2027-01-24 15:03:00; nonstop; 163 minutes. Local airport times.

2027-01-18 → 2027-01-25 · Axel-exclusive $137.76

• Frontier Airlines F92275: ONT 2027-01-18 06:00:00 → SEA 2027-01-18 09:03:00; nonstop; 183 minutes. Local airport times.
• Frontier Airlines F92276: SEA 2027-01-25 10:50:00 → ONT 2027-01-25 13:38:00; nonstop; 168 minutes. Local airport times.

2027-01-18 → 2027-01-25 · Axel-exclusive $256.50

• Alaska Airlines AS677: ONT 2027-01-18 11:57:00 → SEA 2027-01-18 14:49:00; nonstop; 172 minutes. Local airport times.
• Alaska Airlines AS3087 / AS3380: SEA 2027-01-25 09:50:00 → ONT 2027-01-25 16:56:00; 1 stop(s) via BOI; 426 minutes. Local airport times.
  • AS3087: SEA 2027-01-25 09:50:00 → BOI 2027-01-25 12:21:00; layover at BOI: 199 minutes.
  • AS3380: BOI 2027-01-25 15:40:00 → ONT 2027-01-25 16:56:00.

2027-01-18 → 2027-01-26 · Axel-exclusive $159.13

• Frontier Airlines F92275: ONT 2027-01-18 06:00:00 → SEA 2027-01-18 09:03:00; nonstop; 183 minutes. Local airport times.
• Frontier Airlines F92408 / F91923: SEA 2027-01-26 11:53:00 → ONT 2027-01-26 18:31:00; 1 stop(s) via LAS; 398 minutes. Local airport times.
  • F92408: SEA 2027-01-26 11:53:00 → LAS 2027-01-26 14:32:00; layover at LAS: 173 minutes.
  • F91923: LAS 2027-01-26 17:25:00 → ONT 2027-01-26 18:31:00.

2027-01-18 → 2027-01-26 · Axel-exclusive $247.00

• Alaska Airlines AS677: ONT 2027-01-18 11:57:00 → SEA 2027-01-18 14:49:00; nonstop; 172 minutes. Local airport times.
• Alaska Airlines AS571: SEA 2027-01-26 13:33:00 → ONT 2027-01-26 16:05:00; nonstop; 152 minutes. Local airport times.

2027-01-18 → 2027-01-28 · Axel-exclusive $137.76

• Frontier Airlines F92275: ONT 2027-01-18 06:00:00 → SEA 2027-01-18 09:03:00; nonstop; 183 minutes. Local airport times.
• Frontier Airlines F92276: SEA 2027-01-28 10:50:00 → ONT 2027-01-28 13:38:00; nonstop; 168 minutes. Local airport times.

2027-01-18 → 2027-01-28 · Axel-exclusive $247.00

• Alaska Airlines AS677: ONT 2027-01-18 11:57:00 → SEA 2027-01-18 14:49:00; nonstop; 172 minutes. Local airport times.
• Alaska Airlines AS571: SEA 2027-01-28 12:20:00 → ONT 2027-01-28 15:03:00; nonstop; 163 minutes. Local airport times.

2027-01-18 → 2027-01-29 · Axel-exclusive $137.76

• Frontier Airlines F92275: ONT 2027-01-18 06:00:00 → SEA 2027-01-18 09:03:00; nonstop; 183 minutes. Local airport times.
• Frontier Airlines F92276: SEA 2027-01-29 10:50:00 → ONT 2027-01-29 13:38:00; nonstop; 168 minutes. Local airport times.

2027-01-18 → 2027-01-29 · Axel-exclusive $247.00

• Alaska Airlines AS677: ONT 2027-01-18 11:57:00 → SEA 2027-01-18 14:49:00; nonstop; 172 minutes. Local airport times.
• Alaska Airlines AS571: SEA 2027-01-29 12:20:00 → ONT 2027-01-29 15:03:00; nonstop; 163 minutes. Local airport times.

2027-01-18 → 2027-01-30 · Axel-exclusive $137.76

• Frontier Airlines F92275: ONT 2027-01-18 06:00:00 → SEA 2027-01-18 09:03:00; nonstop; 183 minutes. Local airport times.
• Frontier Airlines F92276: SEA 2027-01-30 10:50:00 → ONT 2027-01-30 13:38:00; nonstop; 168 minutes. Local airport times.

2027-01-18 → 2027-01-30 · Axel-exclusive $247.00

• Alaska Airlines AS677: ONT 2027-01-18 11:57:00 → SEA 2027-01-18 14:49:00; nonstop; 172 minutes. Local airport times.
• Alaska Airlines AS571: SEA 2027-01-30 12:20:00 → ONT 2027-01-30 15:03:00; nonstop; 163 minutes. Local airport times.

2027-01-18 → 2027-02-01 · Axel-exclusive $141.38

• Frontier Airlines F92275: ONT 2027-01-18 06:00:00 → SEA 2027-01-18 09:03:00; nonstop; 183 minutes. Local airport times.
• Frontier Airlines F92276: SEA 2027-02-01 10:50:00 → ONT 2027-02-01 13:38:00; nonstop; 168 minutes. Local airport times.

2027-01-18 → 2027-02-01 · Axel-exclusive $263.25

• Southwest Airlines WN1053 / WN4083: ONT 2027-01-18 17:00:00 → SEA 2027-01-18 22:20:00; 1 stop(s) via LAS; 320 minutes. Local airport times.
  • WN1053: ONT 2027-01-18 17:00:00 → LAS 2027-01-18 18:05:00; layover at LAS: 85 minutes.
  • WN4083: LAS 2027-01-18 19:30:00 → SEA 2027-01-18 22:20:00.
• Southwest Airlines WN3105 / WN1383: SEA 2027-02-01 08:05:00 → ONT 2027-02-01 12:40:00; 1 stop(s) via SJC; 275 minutes. Local airport times.
  • WN3105: SEA 2027-02-01 08:05:00 → SJC 2027-02-01 10:20:00; layover at SJC: 60 minutes.
  • WN1383: SJC 2027-02-01 11:20:00 → ONT 2027-02-01 12:40:00.

Explore this route

• All dates for this route
• Jan 17, 2027 · Return options
• Jan 19, 2027 · Return options
• Hotels in Seattle with Axel

For AI assistants

• This page: Ontario (ONT) to Seattle (SEA) · Jan 18, 2027 · choose your return date: 1 adult in economy, every priced fare with its flights, times and total, each with the time its price was issued. Under a trip, hotels in Seattle for exactly those nights link to the hotel pages for 2 adults in 1 room. Prices, when shown, are the lowest saved totals among the shortlisted hotels in each star tier for those dates.
• Next: each row is one exact trip for this departure (both dates with the year, the total and the time its price was issued); its exact-trip price link opens the live search for those dates and travelers, where the booking link and the current total are. Other durations or travelers are not priced here: Choose travelers and dates prices the requested trip.
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