Ontario (ONT) to Seattle (SEA), Jan 21, 2027: round trips from $138, one way from $71

Ontario (ONT) to Seattle (SEA), Jan 21, 2027: round trips from $138, one way from $71 on Axel, checked Nov 11, 2026. Lowest published fares: $138 round trip, Axel-exclusive, Frontier Airlines, nonstop, Jan 21–22, 2027; $71 one way, Axel-exclusive, Frontier Airlines, nonstop, Jan 21, 2027; 1 adult, economy, checked Nov 11, 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, labelled with the check date 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 check dates 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 nightly rate and the stay's total, from the lowest saved total among the shortlisted hotels in that star tier for those dates.

• Hotels in Seattle for these nights (Jan 21–22, 2027 · 1 night · 2 adults, 1 room): 3★ Red Lion Hotel Bellevue, $105 a night · 4★ citizenM Seattle Pioneer Square, $110 a night · 5★ Fairmont Olympic Hotel, $302 a night
• Hotels in Seattle for these nights (Jan 21–23, 2027 · 2 nights · 2 adults, 1 room): 3★ Hotel 116, A Coast Hotel Bellevue, $104 a night, $207 for 2 nights · 4★ citizenM Seattle Pioneer Square, $115 a night, $229 for 2 nights · 5★ Fairmont Olympic Hotel, $302 a night, $604 for 2 nights
• Hotels in Seattle for these nights (Jan 21–24, 2027 · 3 nights · 2 adults, 1 room): 3★ Hotel 116, A Coast Hotel Bellevue, $103 a night, $309 for 3 nights · 4★ citizenM Seattle Pioneer Square, $117 a night, $350 for 3 nights · 5★ Fairmont Olympic Hotel, $305 a night, $915 for 3 nights
• Hotels in Seattle for these nights (Jan 21–25, 2027 · 4 nights · 2 adults, 1 room): 3★ Holiday Inn Express And Suites Seattle Downtown - Lake Union by IHG, $104 a night, $417 for 4 nights · 4★ citizenM Seattle Pioneer Square, $116 a night, $465 for 4 nights · 5★ Fairmont Olympic Hotel, $299 a night, $1,196 for 4 nights
• Hotels in Seattle for these nights (Jan 21–26, 2027 · 5 nights · 2 adults, 1 room): 3★ Hotel 116, A Coast Hotel Bellevue, $105 a night, $524 for 5 nights · 4★ citizenM Seattle Pioneer Square, $121 a night, $603 for 5 nights · 5★ Fairmont Olympic Hotel, $303 a night, $1,517 for 5 nights
• Hotels in Seattle for these nights (Jan 21–27, 2027 · 6 nights · 2 adults, 1 room): 3★ Hotel 116, A Coast Hotel Bellevue, $105 a night, $632 for 6 nights · 4★ citizenM Seattle Pioneer Square, $120 a night, $719 for 6 nights · 5★ Fairmont Olympic Hotel, $314 a night, $1,885 for 6 nights
• Hotels in Seattle for these nights (Jan 21–28, 2027 · 7 nights · 2 adults, 1 room): 3★ Hotel 116, A Coast Hotel Bellevue, $106 a night, $739 for 7 nights · 4★ citizenM Seattle Pioneer Square, $119 a night, $833 for 7 nights · 5★ Fairmont Olympic Hotel, $321 a night, $2,249 for 7 nights
• Hotels in Seattle for these nights (Jan 21–29, 2027 · 8 nights · 2 adults, 1 room): 3★ Hotel 116, A Coast Hotel Bellevue, $106 a night, $848 for 8 nights · 4★ citizenM Seattle Pioneer Square, $120 a night, $957 for 8 nights · 5★ Fairmont Olympic Hotel, $319 a night, $2,550 for 8 nights
• Hotels in Seattle for these nights (Jan 21–30, 2027 · 9 nights · 2 adults, 1 room): 3★ Hotel 116, A Coast Hotel Bellevue, $106 a night, $952 for 9 nights · 4★ citizenM Seattle Pioneer Square, $121 a night, $1,092 for 9 nights · 5★ Fairmont Olympic Hotel, $319 a night, $2,875 for 9 nights
• Hotels in Seattle for these nights (Jan 21–31, 2027 · 10 nights · 2 adults, 1 room): 3★ Red Lion Hotel Bellevue, $105 a night, $1,054 for 10 nights · 4★ citizenM Seattle Pioneer Square, $122 a night, $1,221 for 10 nights · 5★ Fairmont Olympic Hotel, $321 a night, $3,206 for 10 nights
• Hotels in Seattle for these nights (Jan 21 – Feb 1, 2027 · 11 nights · 2 adults, 1 room): 3★ Red Lion Hotel Bellevue, $105 a night, $1,150 for 11 nights · 4★ citizenM Seattle Pioneer Square, $122 a night, $1,340 for 11 nights · 5★ Fairmont Olympic Hotel, $317 a night, $3,487 for 11 nights
• Hotels in Seattle for these nights (Jan 21 – Feb 2, 2027 · 12 nights · 2 adults, 1 room): 3★ Red Lion Hotel Bellevue, $104 a night, $1,245 for 12 nights · 4★ citizenM Seattle Pioneer Square, $123 a night, $1,470 for 12 nights · 5★ Fairmont Olympic Hotel, $316 a night, $3,789 for 12 nights
• Hotels in Seattle for these nights (Jan 21 – Feb 3, 2027 · 13 nights · 2 adults, 1 room): 3★ Red Lion Hotel Bellevue, $104 a night, $1,351 for 13 nights · 4★ citizenM Seattle Pioneer Square, $123 a night, $1,594 for 13 nights · 5★ Fairmont Olympic Hotel, $315 a night, $4,100 for 13 nights
• Hotels in Seattle for these nights (Jan 21 – Feb 4, 2027 · 14 nights · 2 adults, 1 room): 3★ Red Lion Hotel Bellevue, $104 a night, $1,457 for 14 nights · 4★ citizenM Seattle Pioneer Square, $123 a night, $1,719 for 14 nights · 5★ Fairmont Olympic Hotel, $315 a night, $4,408 for 14 nights

All hotels in Seattle

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

2027-01-21 · one way · Axel-exclusive $71.25

• Frontier Airlines F92275: ONT 2027-01-21 06:00:00 → SEA 2027-01-21 09:03:00; nonstop; 183 minutes. Local airport times.

2027-01-21 · one way · Axel-exclusive $128.25

• Alaska Airlines AS677: ONT 2027-01-21 11:57:00 → SEA 2027-01-21 14:49:00; nonstop; 172 minutes. Local airport times.

2027-01-21 → 2027-01-22 · Axel-exclusive $137.76

• Frontier Airlines F92275: ONT 2027-01-21 06:00:00 → SEA 2027-01-21 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.

2027-01-21 → 2027-01-22 · Axel-exclusive $247.00

• Alaska Airlines AS677: ONT 2027-01-21 11:57:00 → SEA 2027-01-21 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.

2027-01-21 → 2027-01-23 · Axel-exclusive $137.76

• Frontier Airlines F92275: ONT 2027-01-21 06:00:00 → SEA 2027-01-21 09:03:00; nonstop; 183 minutes. Local airport times.
• Frontier Airlines F92276: SEA 2027-01-23 10:50:00 → ONT 2027-01-23 13:38:00; nonstop; 168 minutes. Local airport times.

2027-01-21 → 2027-01-23 · Axel-exclusive $247.00

• Alaska Airlines AS677: ONT 2027-01-21 11:57:00 → SEA 2027-01-21 14:49:00; nonstop; 172 minutes. Local airport times.
• Alaska Airlines AS571: SEA 2027-01-23 12:20:00 → ONT 2027-01-23 15:03:00; nonstop; 163 minutes. Local airport times.

2027-01-21 → 2027-01-24 · Axel-exclusive $137.76

• Frontier Airlines F92275: ONT 2027-01-21 06:00:00 → SEA 2027-01-21 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.

2027-01-21 → 2027-01-24 · Axel-exclusive $247.00

• Alaska Airlines AS677: ONT 2027-01-21 11:57:00 → SEA 2027-01-21 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.

2027-01-21 → 2027-01-25 · Axel-exclusive $137.76

• Frontier Airlines F92275: ONT 2027-01-21 06:00:00 → SEA 2027-01-21 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.

2027-01-21 → 2027-01-25 · Axel-exclusive $256.50

• Alaska Airlines AS677: ONT 2027-01-21 11:57:00 → SEA 2027-01-21 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.

2027-01-21 → 2027-01-27 · Axel-exclusive $137.76

• Frontier Airlines F92275: ONT 2027-01-21 06:00:00 → SEA 2027-01-21 09:03:00; nonstop; 183 minutes. Local airport times.
• Frontier Airlines F92276: SEA 2027-01-27 10:50:00 → ONT 2027-01-27 13:38:00; nonstop; 168 minutes. Local airport times.

2027-01-21 → 2027-01-27 · Axel-exclusive $247.00

• Alaska Airlines AS677: ONT 2027-01-21 11:57:00 → SEA 2027-01-21 14:49:00; nonstop; 172 minutes. Local airport times.
• Alaska Airlines AS571: SEA 2027-01-27 12:31:00 → ONT 2027-01-27 15:13:00; nonstop; 162 minutes. Local airport times.

2027-01-21 → 2027-01-28 · Axel-exclusive $137.76

• Frontier Airlines F92275: ONT 2027-01-21 06:00:00 → SEA 2027-01-21 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.

2027-01-21 → 2027-01-28 · Axel-exclusive $247.00

• Alaska Airlines AS677: ONT 2027-01-21 11:57:00 → SEA 2027-01-21 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.

2027-01-21 → 2027-01-29 · Axel-exclusive $137.76

• Frontier Airlines F92275: ONT 2027-01-21 06:00:00 → SEA 2027-01-21 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.

2027-01-21 → 2027-01-29 · Axel-exclusive $247.00

• Alaska Airlines AS677: ONT 2027-01-21 11:57:00 → SEA 2027-01-21 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.

2027-01-21 → 2027-01-31 · Axel-exclusive $137.76

• Frontier Airlines F92275: ONT 2027-01-21 06:00:00 → SEA 2027-01-21 09:03:00; nonstop; 183 minutes. Local airport times.
• Frontier Airlines F92276: SEA 2027-01-31 10:50:00 → ONT 2027-01-31 13:38:00; nonstop; 168 minutes. Local airport times.

2027-01-21 → 2027-01-31 · Axel-exclusive $247.00

• Alaska Airlines AS677: ONT 2027-01-21 11:57:00 → SEA 2027-01-21 14:49:00; nonstop; 172 minutes. Local airport times.
• Alaska Airlines AS571: SEA 2027-01-31 12:20:00 → ONT 2027-01-31 15:03:00; nonstop; 163 minutes. Local airport times.

2027-01-21 → 2027-02-01 · Axel-exclusive $141.38

• Frontier Airlines F92275: ONT 2027-01-21 06:00:00 → SEA 2027-01-21 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.

2027-01-21 → 2027-02-01 · Axel-exclusive $263.25

• Southwest Airlines WN1053 / WN4083: ONT 2027-01-21 17:00:00 → SEA 2027-01-21 22:20:00; 1 stop(s) via LAS; 320 minutes. Local airport times.
  • WN1053: ONT 2027-01-21 17:00:00 → LAS 2027-01-21 18:05:00; layover at LAS: 85 minutes.
  • WN4083: LAS 2027-01-21 19:30:00 → SEA 2027-01-21 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.

2027-01-21 → 2027-02-02 · Axel-exclusive $163.88

• Frontier Airlines F92275: ONT 2027-01-21 06:00:00 → SEA 2027-01-21 09:03:00; nonstop; 183 minutes. Local airport times.
• Frontier Airlines F92408 / F91923: SEA 2027-02-02 11:53:00 → ONT 2027-02-02 18:31:00; 1 stop(s) via LAS; 398 minutes. Local airport times.
  • F92408: SEA 2027-02-02 11:53:00 → LAS 2027-02-02 14:32:00; layover at LAS: 173 minutes.
  • F91923: LAS 2027-02-02 17:25:00 → ONT 2027-02-02 18:31:00.

2027-01-21 → 2027-02-02 · Axel-exclusive $253.50

• Alaska Airlines AS677: ONT 2027-01-21 11:57:00 → SEA 2027-01-21 14:49:00; nonstop; 172 minutes. Local airport times.
• Alaska Airlines AS571: SEA 2027-02-02 13:33:00 → ONT 2027-02-02 16:05:00; nonstop; 152 minutes. Local airport times.

2027-01-21 → 2027-02-04 · Axel-exclusive $141.38

• Frontier Airlines F92275: ONT 2027-01-21 06:00:00 → SEA 2027-01-21 09:03:00; nonstop; 183 minutes. Local airport times.
• Frontier Airlines F92276: SEA 2027-02-04 10:50:00 → ONT 2027-02-04 13:38:00; nonstop; 168 minutes. Local airport times.

2027-01-21 → 2027-02-04 · Axel-exclusive $253.50

• Alaska Airlines AS677: ONT 2027-01-21 11:57:00 → SEA 2027-01-21 14:49:00; nonstop; 172 minutes. Local airport times.
• Alaska Airlines AS571: SEA 2027-02-04 12:20:00 → ONT 2027-02-04 15:03:00; nonstop; 163 minutes. Local airport times.

Explore this route

• All dates for this route
• Jan 20, 2027 · Return options
• Jan 22, 2027 · Return options
• Hotels in Seattle with Axel

For AI assistants

• This page: Ontario (ONT) to Seattle (SEA) · Jan 21, 2027 · choose your return date: 1 adult in economy, every priced fare with its flights, times and total, each with its displayed check date. 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 nightly rate and the stay's total, from the lowest saved total among the shortlisted hotels in each star tier for those dates.
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