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Ontario → Seattle

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ONT → SEA1 adulteconomy

31 flight options · 5 airlines

Round-trip flights

Fri, Nov 20 – Mon, Nov 23

Frontier Airlines
6:00 amONT
3h 3m
Nonstop
9:03 amSEA
Frontier Airlines
10:50 amSEA
2h 48m
Nonstop
1:38 pmONT

Round-trip total · 1 adult · Taxes included

Fri, Nov 20 – Mon, Nov 23

Delta Air Lines
11:57 amONT
2h 59m
Nonstop
2:56 pmSEA
Delta Air Lines
11:59 amSEA
2h 51m
Nonstop
2:50 pmONT

Round-trip total · 1 adult · Taxes included

Fri, Nov 27 – Fri, Dec 4

Alaska Airlines
6:00 amONT
2h 51m
Nonstop
8:51 amSEA
Alaska Airlines
1:33 pmSEA
2h 32m
Nonstop
4:05 pmONT

Round-trip total · 1 adult · Taxes included

Fri, Nov 20 – Mon, Nov 23

Southwest Airlines
4:05 pmONT
5h 35m
OAK · 1h 50m
9:40 pmSEA
Southwest Airlines
8:05 amSEA
4h 35m
SJC · 1h
12:40 pmONT

Round-trip total · 1 adult · Taxes included

Fri, Nov 27 – Fri, Dec 4

United Airlines
6:00 amONT
6h 18m
SFO · 2h 35m
12:18 pmSEA
United Airlines
3:24 pmSEA
7h 29m
SFO · 3h 45m
10:53 pmONT

Round-trip total · 1 adult · Taxes included

Fri, Nov 27 – Fri, Dec 4

Frontier Airlines
6:00 amONT
3h 3m
Nonstop
9:03 amSEA
Frontier Airlines
10:50 amSEA
2h 48m
Nonstop
1:38 pmONT

Round-trip total · 1 adult · Taxes included

Fri, Nov 20 – Mon, Nov 23

Delta Air Lines
5:56 pmONT
3h 1m
Nonstop
8:57 pmSEA
Delta Air Lines
11:59 amSEA
2h 51m
Nonstop
2:50 pmONT

Round-trip total · 1 adult · Taxes included

Fri, Nov 27 – Fri, Dec 4

Alaska Airlines
4:09 pmONT
2h 47m
Nonstop
6:56 pmSEA
Alaska Airlines
1:33 pmSEA
2h 32m
Nonstop
4:05 pmONT

Round-trip total · 1 adult · Taxes included

Show 12 more flights

Fri, Nov 27 – Fri, Dec 4

Delta Air Lines
11:57 amONT
2h 59m
Nonstop
2:56 pmSEA
Delta Air Lines
11:59 amSEA
2h 51m
Nonstop
2:50 pmONT

Round-trip total · 1 adult · Taxes included

Fri, Nov 27 – Fri, Dec 4

Delta Air Lines
5:56 pmONT
3h 1m
Nonstop
8:57 pmSEA
Delta Air Lines
11:59 amSEA
2h 51m
Nonstop
2:50 pmONT

Round-trip total · 1 adult · Taxes included

Fri, Nov 20 – Mon, Nov 23

Alaska Airlines
4:09 pmONT
2h 47m
Nonstop
6:56 pmSEA
Alaska Airlines
9:50 amSEA
7h 6m
BOI · 3h 19m
4:56 pmONT

Round-trip total · 1 adult · Taxes included

Fri, Nov 20 – Mon, Nov 23

Southwest Airlines
5:00 pmONT
5h 20m
LAS · 1h 25m
10:20 pmSEA
Southwest Airlines
8:05 amSEA
4h 35m
SJC · 1h
12:40 pmONT

Round-trip total · 1 adult · Taxes included

Fri, Nov 20 – Mon, Nov 23

Southwest Airlines
1:30 pmONT
5h 10m
SMF · 1h 45m
6:40 pmSEA
Southwest Airlines
8:05 amSEA
4h 35m
SJC · 1h
12:40 pmONT

Round-trip total · 1 adult · Taxes included

Fri, Nov 20 – Mon, Nov 23

Alaska Airlines
5:36 pmONT
4h 52m
BOI · 1h 6m
10:28 pmSEA
Alaska Airlines
9:50 amSEA
7h 6m
BOI · 3h 19m
4:56 pmONT

Round-trip total · 1 adult · Taxes included

Fri, Nov 20 – Mon, Nov 23

Delta Air Lines
5:38 pmONT
3h 5m
Nonstop
8:43 pmSEA
Delta Air Lines
9:18 amSEA
7h 4m
SLC · 2h 58m
4:22 pmONT

Round-trip total · 1 adult · Taxes included

Fri, Nov 27 – Fri, Dec 4

Southwest Airlines
1:30 pmONT
5h 10m
SMF · 1h 45m
6:40 pmSEA
Southwest Airlines
8:05 amSEA
4h 35m
SJC · 1h
12:40 pmONT

Round-trip total · 1 adult · Taxes included

Fri, Nov 27 – Fri, Dec 4

Southwest Airlines
5:00 pmONT
5h 20m
LAS · 1h 25m
10:20 pmSEA
Southwest Airlines
8:05 amSEA
4h 35m
SJC · 1h
12:40 pmONT

Round-trip total · 1 adult · Taxes included

Fri, Nov 27 – Fri, Dec 4

Southwest Airlines
4:05 pmONT
5h 35m
OAK · 1h 50m
9:40 pmSEA
Southwest Airlines
8:05 amSEA
4h 35m
SJC · 1h
12:40 pmONT

Round-trip total · 1 adult · Taxes included

Fri, Nov 27 – Fri, Dec 4

Alaska Airlines
5:36 pmONT
4h 52m
BOI · 1h 6m
10:28 pmSEA
Alaska Airlines
1:33 pmSEA
2h 32m
Nonstop
4:05 pmONT

Round-trip total · 1 adult · Taxes included

Fri, Nov 27 – Fri, Dec 4

Delta Air Lines
6:00 amONT
6h 36m
SLC · 2h 26m
12:36 pmSEA
Delta Air Lines
11:59 amSEA
2h 51m
Nonstop
2:50 pmONT

Round-trip total · 1 adult · Taxes included

One-way flights

Fri, Nov 20 · One way

Frontier Airlines
6:00 amONT
3h 3m
Nonstop
9:03 amSEA

One-way total · 1 adult · Taxes included

Fri, Nov 20 · One way

Alaska Airlines
6:00 amONT
2h 51m
Nonstop
8:51 amSEA

One-way total · 1 adult · Taxes included

Fri, Nov 20 · One way

Delta Air Lines
5:56 pmONT
3h 1m
Nonstop
8:57 pmSEA

One-way total · 1 adult · Taxes included

Fri, Nov 20 · One way

Southwest Airlines
1:30 pmONT
5h 10m
SMF · 1h 45m
6:40 pmSEA

One-way total · 1 adult · Taxes included

Fri, Nov 20 · One way

United Airlines
6:00 amONT
6h 18m
SFO · 2h 35m
12:18 pmSEA

One-way total · 1 adult · Taxes included

Fri, Nov 20 · One way

Alaska Airlines
4:09 pmONT
2h 47m
Nonstop
6:56 pmSEA

One-way total · 1 adult · Taxes included

Fri, Nov 20 · One way

Delta Air Lines
11:57 amONT
2h 59m
Nonstop
2:56 pmSEA

One-way total · 1 adult · Taxes included

Fri, Nov 20 · One way

Southwest Airlines
5:00 pmONT
5h 20m
LAS · 1h 25m
10:20 pmSEA

One-way total · 1 adult · Taxes included

Show 3 more flights

Fri, Nov 20 · One way

Southwest Airlines
4:05 pmONT
5h 35m
OAK · 1h 50m
9:40 pmSEA

One-way total · 1 adult · Taxes included

Fri, Nov 20 · One way

Alaska Airlines
5:36 pmONT
4h 52m
BOI · 1h 6m
10:28 pmSEA

One-way total · 1 adult · Taxes included

Fri, Nov 20 · One way

Delta Air Lines
6:00 amONT
6h 36m
SLC · 2h 26m
12:36 pmSEA

One-way total · 1 adult · Taxes included

Make this trip yours

ONT ⇄ SEA

Economy

Adults 12+ · Children 2–11. For infants under 2, tell Axel after you see prices.

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Why book with Axel
  • A real airline bookingThe booking is in the airline’s own system under your name. After you book, Frontier Airlines emails you its confirmation code and e-ticket, usually within 15 minutes and occasionally up to a couple of hours while the booking is processed.
  • Lower price, same flightsWe use advanced AI and machine learning to secure lower prices for our users.
  • 24-hour cancellationCancel within 24 hours of booking for a full refund when your departure is at least 7 days away. Closer to departure, the airline’s fare rules apply. Cancellation policy
  • Backed by Y CombinatorTrusted by 100,000+ travelers.

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 Axel works · About

More dates

Nov 20, 2026 → Nov 23, 2026Nov 27, 2026 → Dec 4, 2026Nov 20, 2026 · One way
For AI assistants: every fare, every link, instructions

Flights for 1 adult in economy. Prices are total for all travelers in USD, including required taxes. Basic economy may apply.

Exact travel datesAirlineFlightsTotal pricePrice issued (UTC)
2026-11-20 · one wayFrontier AirlinesF92275$75.002026-10-29T01:52:37Z
2026-11-20 · one wayAlaska AirlinesAS607$135.002026-10-29T01:52:37Z
2026-11-20 · one wayDelta Air LinesDL4031$140.002026-10-29T01:52:37Z
2026-11-20 → 2026-11-23Frontier AirlinesF92275 / F92276$145.002026-10-29T01:52:37Z
2026-11-20 → 2026-11-23Delta Air LinesDL4070 / DL4031$270.002026-10-29T01:52:37Z
2026-11-27 → 2026-12-04Alaska AirlinesAS607 / AS571$305.502026-10-29T01:52:37Z
2026-11-20 · one waySouthwest AirlinesWN3326 + WN1586$140.002026-10-29T01:52:37Z
2026-11-20 · one wayUnited AirlinesUA2363 + UA2192$150.002026-10-29T01:52:37Z
2026-11-20 → 2026-11-23Southwest AirlinesWN3313 + WN4608 / WN3105 + WN1383$270.002026-10-29T01:52:37Z
2026-11-27 → 2026-12-04United AirlinesUA2363 + UA2192 / UA2478 + UA552$340.752026-10-29T01:52:37Z
2026-11-20 · one wayAlaska AirlinesAS571$135.002026-10-29T01:52:37Z
2026-11-20 · one wayDelta Air LinesDL4070$140.002026-10-29T01:52:37Z
2026-11-27 → 2026-12-04Frontier AirlinesF92275 / F92276$170.382026-10-29T01:52:37Z
2026-11-20 → 2026-11-23Delta Air LinesDL4031 / DL4031$270.002026-10-29T01:52:37Z
2026-11-27 → 2026-12-04Alaska AirlinesAS571 / AS571$305.502026-10-29T01:52:37Z
2026-11-27 → 2026-12-04Delta Air LinesDL4070 / DL4031$317.252026-10-29T01:52:37Z
2026-11-27 → 2026-12-04Delta Air LinesDL4031 / DL4031$317.252026-10-29T01:52:37Z
2026-11-20 · one waySouthwest AirlinesWN1053 + WN4083$140.002026-10-29T01:52:37Z
2026-11-20 · one waySouthwest AirlinesWN3313 + WN4608$140.002026-10-29T01:52:37Z
2026-11-20 · one wayAlaska AirlinesAS3380 + AS2016$145.002026-10-29T01:52:37Z
2026-11-20 · one wayDelta Air LinesDL2708 + DL2995$150.002026-10-29T01:52:37Z
2026-11-20 → 2026-11-23Alaska AirlinesAS571 / AS3087 + AS3380$270.002026-10-29T01:52:37Z
2026-11-20 → 2026-11-23Southwest AirlinesWN1053 + WN4083 / WN3105 + WN1383$270.002026-10-29T01:52:37Z
2026-11-20 → 2026-11-23Southwest AirlinesWN3326 + WN1586 / WN3105 + WN1383$270.002026-10-29T01:52:37Z
2026-11-20 → 2026-11-23Alaska AirlinesAS3380 + AS2016 / AS3087 + AS3380$280.002026-10-29T01:52:37Z
2026-11-20 → 2026-11-23Delta Air LinesDL4031 / DL1016 + DL3879$280.002026-10-29T01:52:37Z
2026-11-27 → 2026-12-04Southwest AirlinesWN3326 + WN1586 / WN3105 + WN1383$317.252026-10-29T01:52:37Z
2026-11-27 → 2026-12-04Southwest AirlinesWN1053 + WN4083 / WN3105 + WN1383$317.252026-10-29T01:52:37Z
2026-11-27 → 2026-12-04Southwest AirlinesWN3313 + WN4608 / WN3105 + WN1383$317.252026-10-29T01:52:37Z
2026-11-27 → 2026-12-04Alaska AirlinesAS3380 + AS2016 / AS571$319.002026-10-29T01:52:37Z
2026-11-27 → 2026-12-04Delta Air LinesDL2708 + DL2995 / DL4031$330.752026-10-29T01:52:37Z

2026-11-20 · one way · $75.00

  • Frontier Airlines F92275: ONT 2026-11-20 06:00:00 → SEA 2026-11-20 09:03:00; nonstop; 183 minutes. Local airport times.

2026-11-20 · one way · $135.00

  • Alaska Airlines AS607: ONT 2026-11-20 06:00:00 → SEA 2026-11-20 08:51:00; nonstop; 171 minutes. Local airport times.

2026-11-20 · one way · $140.00

  • Delta Air Lines DL4031: ONT 2026-11-20 17:56:00 → SEA 2026-11-20 20:57:00; nonstop; 181 minutes. Local airport times.

2026-11-20 → 2026-11-23 · $145.00

  • Frontier Airlines F92275: ONT 2026-11-20 06:00:00 → SEA 2026-11-20 09:03:00; nonstop; 183 minutes. Local airport times.
  • Frontier Airlines F92276: SEA 2026-11-23 10:50:00 → ONT 2026-11-23 13:38:00; nonstop; 168 minutes. Local airport times.

2026-11-20 → 2026-11-23 · $270.00

  • Delta Air Lines DL4070: ONT 2026-11-20 11:57:00 → SEA 2026-11-20 14:56:00; nonstop; 179 minutes. Local airport times.
  • Delta Air Lines DL4031: SEA 2026-11-23 11:59:00 → ONT 2026-11-23 14:50:00; nonstop; 171 minutes. Local airport times.

2026-11-27 → 2026-12-04 · $305.50

  • Alaska Airlines AS607: ONT 2026-11-27 06:00:00 → SEA 2026-11-27 08:51:00; nonstop; 171 minutes. Local airport times.
  • Alaska Airlines AS571: SEA 2026-12-04 13:33:00 → ONT 2026-12-04 16:05:00; nonstop; 152 minutes. Local airport times.

2026-11-20 · one way · $140.00

  • Southwest Airlines WN3326 / WN1586: ONT 2026-11-20 13:30:00 → SEA 2026-11-20 18:40:00; 1 stop(s) via SMF; 310 minutes. Local airport times.
    • WN3326: ONT 2026-11-20 13:30:00 → SMF 2026-11-20 14:55:00; layover at SMF: 105 minutes.
    • WN1586: SMF 2026-11-20 16:40:00 → SEA 2026-11-20 18:40:00.

2026-11-20 · one way · $150.00

  • United Airlines UA2363 / UA2192: ONT 2026-11-20 06:00:00 → SEA 2026-11-20 12:18:00; 1 stop(s) via SFO; 378 minutes. Local airport times.
    • UA2363: ONT 2026-11-20 06:00:00 → SFO 2026-11-20 07:30:00; layover at SFO: 155 minutes.
    • UA2192: SFO 2026-11-20 10:05:00 → SEA 2026-11-20 12:18:00.

2026-11-20 → 2026-11-23 · $270.00

  • Southwest Airlines WN3313 / WN4608: ONT 2026-11-20 16:05:00 → SEA 2026-11-20 21:40:00; 1 stop(s) via OAK; 335 minutes. Local airport times.
    • WN3313: ONT 2026-11-20 16:05:00 → OAK 2026-11-20 17:30:00; layover at OAK: 110 minutes.
    • WN4608: OAK 2026-11-20 19:20:00 → SEA 2026-11-20 21:40:00.
  • Southwest Airlines WN3105 / WN1383: SEA 2026-11-23 08:05:00 → ONT 2026-11-23 12:40:00; 1 stop(s) via SJC; 275 minutes. Local airport times.
    • WN3105: SEA 2026-11-23 08:05:00 → SJC 2026-11-23 10:20:00; layover at SJC: 60 minutes.
    • WN1383: SJC 2026-11-23 11:20:00 → ONT 2026-11-23 12:40:00.

2026-11-27 → 2026-12-04 · $340.75

  • United Airlines UA2363 / UA2192: ONT 2026-11-27 06:00:00 → SEA 2026-11-27 12:18:00; 1 stop(s) via SFO; 378 minutes. Local airport times.
    • UA2363: ONT 2026-11-27 06:00:00 → SFO 2026-11-27 07:30:00; layover at SFO: 155 minutes.
    • UA2192: SFO 2026-11-27 10:05:00 → SEA 2026-11-27 12:18:00.
  • United Airlines UA2478 / UA552: SEA 2026-12-04 15:24:00 → ONT 2026-12-04 22:53:00; 1 stop(s) via SFO; 449 minutes. Local airport times.
    • UA2478: SEA 2026-12-04 15:24:00 → SFO 2026-12-04 17:45:00; layover at SFO: 225 minutes.
    • UA552: SFO 2026-12-04 21:30:00 → ONT 2026-12-04 22:53:00.

2026-11-20 · one way · $135.00

  • Alaska Airlines AS571: ONT 2026-11-20 16:09:00 → SEA 2026-11-20 18:56:00; nonstop; 167 minutes. Local airport times.

2026-11-20 · one way · $140.00

  • Delta Air Lines DL4070: ONT 2026-11-20 11:57:00 → SEA 2026-11-20 14:56:00; nonstop; 179 minutes. Local airport times.

2026-11-27 → 2026-12-04 · $170.38

  • Frontier Airlines F92275: ONT 2026-11-27 06:00:00 → SEA 2026-11-27 09:03:00; nonstop; 183 minutes. Local airport times.
  • Frontier Airlines F92276: SEA 2026-12-04 10:50:00 → ONT 2026-12-04 13:38:00; nonstop; 168 minutes. Local airport times.

2026-11-20 → 2026-11-23 · $270.00

  • Delta Air Lines DL4031: ONT 2026-11-20 17:56:00 → SEA 2026-11-20 20:57:00; nonstop; 181 minutes. Local airport times.
  • Delta Air Lines DL4031: SEA 2026-11-23 11:59:00 → ONT 2026-11-23 14:50:00; nonstop; 171 minutes. Local airport times.

2026-11-27 → 2026-12-04 · $305.50

  • Alaska Airlines AS571: ONT 2026-11-27 16:09:00 → SEA 2026-11-27 18:56:00; nonstop; 167 minutes. Local airport times.
  • Alaska Airlines AS571: SEA 2026-12-04 13:33:00 → ONT 2026-12-04 16:05:00; nonstop; 152 minutes. Local airport times.

2026-11-27 → 2026-12-04 · $317.25

  • Delta Air Lines DL4070: ONT 2026-11-27 11:57:00 → SEA 2026-11-27 14:56:00; nonstop; 179 minutes. Local airport times.
  • Delta Air Lines DL4031: SEA 2026-12-04 11:59:00 → ONT 2026-12-04 14:50:00; nonstop; 171 minutes. Local airport times.

2026-11-27 → 2026-12-04 · $317.25

  • Delta Air Lines DL4031: ONT 2026-11-27 17:56:00 → SEA 2026-11-27 20:57:00; nonstop; 181 minutes. Local airport times.
  • Delta Air Lines DL4031: SEA 2026-12-04 11:59:00 → ONT 2026-12-04 14:50:00; nonstop; 171 minutes. Local airport times.

2026-11-20 · one way · $140.00

  • Southwest Airlines WN1053 / WN4083: ONT 2026-11-20 17:00:00 → SEA 2026-11-20 22:20:00; 1 stop(s) via LAS; 320 minutes. Local airport times.
    • WN1053: ONT 2026-11-20 17:00:00 → LAS 2026-11-20 18:05:00; layover at LAS: 85 minutes.
    • WN4083: LAS 2026-11-20 19:30:00 → SEA 2026-11-20 22:20:00.

2026-11-20 · one way · $140.00

  • Southwest Airlines WN3313 / WN4608: ONT 2026-11-20 16:05:00 → SEA 2026-11-20 21:40:00; 1 stop(s) via OAK; 335 minutes. Local airport times.
    • WN3313: ONT 2026-11-20 16:05:00 → OAK 2026-11-20 17:30:00; layover at OAK: 110 minutes.
    • WN4608: OAK 2026-11-20 19:20:00 → SEA 2026-11-20 21:40:00.

2026-11-20 · one way · $145.00

  • Alaska Airlines AS3380 / AS2016: ONT 2026-11-20 17:36:00 → SEA 2026-11-20 22:28:00; 1 stop(s) via BOI; 292 minutes. Local airport times.
    • AS3380: ONT 2026-11-20 17:36:00 → BOI 2026-11-20 20:41:00; layover at BOI: 66 minutes.
    • AS2016: BOI 2026-11-20 21:47:00 → SEA 2026-11-20 22:28:00.

2026-11-20 · one way · $150.00

  • Delta Air Lines DL2708 / DL2995: ONT 2026-11-20 06:00:00 → SEA 2026-11-20 12:36:00; 1 stop(s) via SLC; 396 minutes. Local airport times.
    • DL2708: ONT 2026-11-20 06:00:00 → SLC 2026-11-20 08:49:00; layover at SLC: 146 minutes.
    • DL2995: SLC 2026-11-20 11:15:00 → SEA 2026-11-20 12:36:00.

2026-11-20 → 2026-11-23 · $270.00

  • Alaska Airlines AS571: ONT 2026-11-20 16:09:00 → SEA 2026-11-20 18:56:00; nonstop; 167 minutes. Local airport times.
  • Alaska Airlines AS3087 / AS3380: SEA 2026-11-23 09:50:00 → ONT 2026-11-23 16:56:00; 1 stop(s) via BOI; 426 minutes. Local airport times.
    • AS3087: SEA 2026-11-23 09:50:00 → BOI 2026-11-23 12:21:00; layover at BOI: 199 minutes.
    • AS3380: BOI 2026-11-23 15:40:00 → ONT 2026-11-23 16:56:00.

2026-11-20 → 2026-11-23 · $270.00

  • Southwest Airlines WN1053 / WN4083: ONT 2026-11-20 17:00:00 → SEA 2026-11-20 22:20:00; 1 stop(s) via LAS; 320 minutes. Local airport times.
    • WN1053: ONT 2026-11-20 17:00:00 → LAS 2026-11-20 18:05:00; layover at LAS: 85 minutes.
    • WN4083: LAS 2026-11-20 19:30:00 → SEA 2026-11-20 22:20:00.
  • Southwest Airlines WN3105 / WN1383: SEA 2026-11-23 08:05:00 → ONT 2026-11-23 12:40:00; 1 stop(s) via SJC; 275 minutes. Local airport times.
    • WN3105: SEA 2026-11-23 08:05:00 → SJC 2026-11-23 10:20:00; layover at SJC: 60 minutes.
    • WN1383: SJC 2026-11-23 11:20:00 → ONT 2026-11-23 12:40:00.

2026-11-20 → 2026-11-23 · $270.00

  • Southwest Airlines WN3326 / WN1586: ONT 2026-11-20 13:30:00 → SEA 2026-11-20 18:40:00; 1 stop(s) via SMF; 310 minutes. Local airport times.
    • WN3326: ONT 2026-11-20 13:30:00 → SMF 2026-11-20 14:55:00; layover at SMF: 105 minutes.
    • WN1586: SMF 2026-11-20 16:40:00 → SEA 2026-11-20 18:40:00.
  • Southwest Airlines WN3105 / WN1383: SEA 2026-11-23 08:05:00 → ONT 2026-11-23 12:40:00; 1 stop(s) via SJC; 275 minutes. Local airport times.
    • WN3105: SEA 2026-11-23 08:05:00 → SJC 2026-11-23 10:20:00; layover at SJC: 60 minutes.
    • WN1383: SJC 2026-11-23 11:20:00 → ONT 2026-11-23 12:40:00.

2026-11-20 → 2026-11-23 · $280.00

  • Alaska Airlines AS3380 / AS2016: ONT 2026-11-20 17:36:00 → SEA 2026-11-20 22:28:00; 1 stop(s) via BOI; 292 minutes. Local airport times.
    • AS3380: ONT 2026-11-20 17:36:00 → BOI 2026-11-20 20:41:00; layover at BOI: 66 minutes.
    • AS2016: BOI 2026-11-20 21:47:00 → SEA 2026-11-20 22:28:00.
  • Alaska Airlines AS3087 / AS3380: SEA 2026-11-23 09:50:00 → ONT 2026-11-23 16:56:00; 1 stop(s) via BOI; 426 minutes. Local airport times.
    • AS3087: SEA 2026-11-23 09:50:00 → BOI 2026-11-23 12:21:00; layover at BOI: 199 minutes.
    • AS3380: BOI 2026-11-23 15:40:00 → ONT 2026-11-23 16:56:00.

2026-11-20 → 2026-11-23 · $280.00

  • Delta Air Lines DL4031: ONT 2026-11-20 17:38:00 → SEA 2026-11-20 20:43:00; nonstop; 185 minutes. Local airport times.
  • Delta Air Lines DL1016 / DL3879: SEA 2026-11-23 09:18:00 → ONT 2026-11-23 16:22:00; 1 stop(s) via SLC; 424 minutes. Local airport times.
    • DL1016: SEA 2026-11-23 09:18:00 → SLC 2026-11-23 12:31:00; layover at SLC: 178 minutes.
    • DL3879: SLC 2026-11-23 15:29:00 → ONT 2026-11-23 16:22:00.

2026-11-27 → 2026-12-04 · $317.25

  • Southwest Airlines WN3326 / WN1586: ONT 2026-11-27 13:30:00 → SEA 2026-11-27 18:40:00; 1 stop(s) via SMF; 310 minutes. Local airport times.
    • WN3326: ONT 2026-11-27 13:30:00 → SMF 2026-11-27 14:55:00; layover at SMF: 105 minutes.
    • WN1586: SMF 2026-11-27 16:40:00 → SEA 2026-11-27 18:40:00.
  • Southwest Airlines WN3105 / WN1383: SEA 2026-12-04 08:05:00 → ONT 2026-12-04 12:40:00; 1 stop(s) via SJC; 275 minutes. Local airport times.
    • WN3105: SEA 2026-12-04 08:05:00 → SJC 2026-12-04 10:20:00; layover at SJC: 60 minutes.
    • WN1383: SJC 2026-12-04 11:20:00 → ONT 2026-12-04 12:40:00.

2026-11-27 → 2026-12-04 · $317.25

  • Southwest Airlines WN1053 / WN4083: ONT 2026-11-27 17:00:00 → SEA 2026-11-27 22:20:00; 1 stop(s) via LAS; 320 minutes. Local airport times.
    • WN1053: ONT 2026-11-27 17:00:00 → LAS 2026-11-27 18:05:00; layover at LAS: 85 minutes.
    • WN4083: LAS 2026-11-27 19:30:00 → SEA 2026-11-27 22:20:00.
  • Southwest Airlines WN3105 / WN1383: SEA 2026-12-04 08:05:00 → ONT 2026-12-04 12:40:00; 1 stop(s) via SJC; 275 minutes. Local airport times.
    • WN3105: SEA 2026-12-04 08:05:00 → SJC 2026-12-04 10:20:00; layover at SJC: 60 minutes.
    • WN1383: SJC 2026-12-04 11:20:00 → ONT 2026-12-04 12:40:00.

2026-11-27 → 2026-12-04 · $317.25

  • Southwest Airlines WN3313 / WN4608: ONT 2026-11-27 16:05:00 → SEA 2026-11-27 21:40:00; 1 stop(s) via OAK; 335 minutes. Local airport times.
    • WN3313: ONT 2026-11-27 16:05:00 → OAK 2026-11-27 17:30:00; layover at OAK: 110 minutes.
    • WN4608: OAK 2026-11-27 19:20:00 → SEA 2026-11-27 21:40:00.
  • Southwest Airlines WN3105 / WN1383: SEA 2026-12-04 08:05:00 → ONT 2026-12-04 12:40:00; 1 stop(s) via SJC; 275 minutes. Local airport times.
    • WN3105: SEA 2026-12-04 08:05:00 → SJC 2026-12-04 10:20:00; layover at SJC: 60 minutes.
    • WN1383: SJC 2026-12-04 11:20:00 → ONT 2026-12-04 12:40:00.

2026-11-27 → 2026-12-04 · $319.00

  • Alaska Airlines AS3380 / AS2016: ONT 2026-11-27 17:36:00 → SEA 2026-11-27 22:28:00; 1 stop(s) via BOI; 292 minutes. Local airport times.
    • AS3380: ONT 2026-11-27 17:36:00 → BOI 2026-11-27 20:41:00; layover at BOI: 66 minutes.
    • AS2016: BOI 2026-11-27 21:47:00 → SEA 2026-11-27 22:28:00.
  • Alaska Airlines AS571: SEA 2026-12-04 13:33:00 → ONT 2026-12-04 16:05:00; nonstop; 152 minutes. Local airport times.

2026-11-27 → 2026-12-04 · $330.75

  • Delta Air Lines DL2708 / DL2995: ONT 2026-11-27 06:00:00 → SEA 2026-11-27 12:36:00; 1 stop(s) via SLC; 396 minutes. Local airport times.
    • DL2708: ONT 2026-11-27 06:00:00 → SLC 2026-11-27 08:49:00; layover at SLC: 146 minutes.
    • DL2995: SLC 2026-11-27 11:15:00 → SEA 2026-11-27 12:36:00.
  • Delta Air Lines DL4031: SEA 2026-12-04 11:59:00 → ONT 2026-12-04 14:50:00; nonstop; 171 minutes. Local airport times.

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