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Seattle → Ontario

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SEA → ONT1 adulteconomy

30 flight options · 6 airlines

Round-trip flights

Fri, Nov 27 – Fri, Dec 4

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

Round-trip total · 1 adult · Taxes included

Fri, Nov 27 – Fri, Dec 4

Alaska Airlines
9:23 pmSEA
2h 36m
Nonstop
11:59 pmONT
Alaska Airlines
4:09 pmONT
2h 47m
Nonstop
6:56 pmSEA

Round-trip total · 1 adult · Taxes included

Fri, Nov 20 – Mon, Nov 23

Delta Air Lines
11:59 amSEA
2h 51m
Nonstop
2:50 pmONT
Delta Air Lines
5:38 pmONT
3h 5m
Nonstop
8:43 pmSEA

Round-trip total · 1 adult · Taxes included

Fri, Nov 20 – Mon, Nov 23

American Airlines
3:00 pmSEA
6h 52m
PHX · 2h 43m
9:52 pmONT
Frontier Airlines
6:00 amONT
3h 3m
Nonstop
9:03 amSEA

Round-trip total · 1 adult · Taxes included

Fri, Nov 20 – Mon, Nov 23

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

Round-trip total · 1 adult · Taxes included

Fri, Nov 20 – Mon, Nov 23

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

Round-trip total · 1 adult · Taxes included

Fri, Nov 20 – Mon, Nov 23

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

Round-trip total · 1 adult · Taxes included

Fri, Nov 20 – Mon, Nov 23

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

Round-trip total · 1 adult · Taxes included

Show 12 more flights

Fri, Nov 20 – Mon, Nov 23

Alaska Airlines
9:23 pmSEA
2h 36m
Nonstop
11:59 pmONT
Alaska Airlines
4:09 pmONT
2h 47m
Nonstop
6:56 pmSEA

Round-trip total · 1 adult · Taxes included

Fri, Nov 27 – Fri, Dec 4

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

Round-trip total · 1 adult · Taxes included

Fri, Nov 27 – Fri, Dec 4

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

Round-trip total · 1 adult · Taxes included

Fri, Nov 20 – Mon, Nov 23

Frontier Airlines
11:53 amSEA
6h 38m
LAS · 2h 53m
6:31 pmONT
Frontier Airlines
6:00 amONT
3h 3m
Nonstop
9:03 amSEA

Round-trip total · 1 adult · Taxes included

Fri, Nov 27 – Fri, Dec 4

Frontier Airlines
11:53 amSEA
6h 38m
LAS · 2h 53m
6:31 pmONT
Frontier Airlines
6:00 amONT
3h 3m
Nonstop
9:03 amSEA

Round-trip total · 1 adult · Taxes included

Fri, Nov 20 – Mon, Nov 23

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

Round-trip total · 1 adult · Taxes included

Fri, Nov 27 – Fri, Dec 4

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

Round-trip total · 1 adult · Taxes included

Fri, Nov 20 – Mon, Nov 23

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

Round-trip total · 1 adult · Taxes included

Fri, Nov 27 – Fri, Dec 4

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

Round-trip total · 1 adult · Taxes included

Fri, Nov 27 – Fri, Dec 4

Delta Air Lines
9:18 amSEA
7h 4m
SLC · 2h 58m
4:22 pmONT
Delta Air Lines
11:57 amONT
2h 59m
Nonstop
2:56 pmSEA

Round-trip total · 1 adult · Taxes included

Fri, Nov 27 – Fri, Dec 4

American Airlines
3:00 pmSEA
6h 52m
PHX · 2h 43m
9:52 pmONT
Alaska Airlines
4:09 pmONT
2h 47m
Nonstop
6:56 pmSEA

Round-trip total · 1 adult · Taxes included

Fri, Nov 27 – Fri, Dec 4

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

Round-trip total · 1 adult · Taxes included

One-way flights

Fri, Nov 20 · One way

Frontier Airlines
10:50 amSEA
2h 48m
Nonstop
1:38 pmONT

One-way total · 1 adult · Taxes included

Fri, Nov 20 · One way

Alaska Airlines
1:33 pmSEA
2h 32m
Nonstop
4:05 pmONT

One-way total · 1 adult · Taxes included

Fri, Nov 20 · One way

Delta Air Lines
11:59 amSEA
2h 51m
Nonstop
2:50 pmONT

One-way total · 1 adult · Taxes included

Fri, Nov 20 · One way

Southwest Airlines
8:05 amSEA
4h 35m
SJC · 1h
12:40 pmONT

One-way total · 1 adult · Taxes included

Fri, Nov 20 · One way

American Airlines
3:00 pmSEA
6h 52m
PHX · 2h 43m
9:52 pmONT

One-way total · 1 adult · Taxes included

Fri, Nov 20 · One way

United Airlines
3:24 pmSEA
7h 29m
SFO · 3h 45m
10:53 pmONT

One-way total · 1 adult · Taxes included

Fri, Nov 20 · One way

Alaska Airlines
9:23 pmSEA
2h 36m
Nonstop
11:59 pmONT

One-way total · 1 adult · Taxes included

Fri, Nov 20 · One way

Frontier Airlines
11:53 amSEA
6h 38m
LAS · 2h 53m
6:31 pmONT

One-way total · 1 adult · Taxes included

Show 2 more flights

Fri, Nov 20 · One way

Alaska Airlines
9:50 amSEA
7h 6m
BOI · 3h 19m
4:56 pmONT

One-way total · 1 adult · Taxes included

Fri, Nov 20 · One way

Delta Air Lines
9:18 amSEA
7h 4m
SLC · 2h 58m
4:22 pmONT

One-way total · 1 adult · Taxes included

Make this trip yours

SEA ⇄ ONT

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 AirlinesF92276$85.002026-10-29T01:16:03Z
2026-11-20 · one wayAlaska AirlinesAS571$145.002026-10-29T01:16:03Z
2026-11-20 · one wayDelta Air LinesDL4031$150.002026-10-29T01:16:03Z
2026-11-27 → 2026-12-04Frontier AirlinesF92276 / F92275$193.882026-10-29T01:16:03Z
2026-11-27 → 2026-12-04Alaska AirlinesAS489 / AS571$327.832026-10-29T01:16:03Z
2026-11-20 → 2026-11-23Delta Air LinesDL4031 / DL4031$339.582026-10-29T01:16:03Z
2026-11-20 · one waySouthwest AirlinesWN3105 + WN1383$165.002026-10-29T01:16:03Z
2026-11-20 · one wayAmerican AirlinesAA2073 + AA1841$185.002026-10-29T01:16:03Z
2026-11-20 · one wayUnited AirlinesUA2478 + UA552$185.002026-10-29T01:16:03Z
2026-11-20 → 2026-11-23American Airlines / Frontier AirlinesAA2073 + AA1841 / F92275$288.882026-10-29T01:16:03Z
2026-11-20 → 2026-11-23Southwest AirlinesWN3105 + WN1383 / WN1053 + WN4083$374.832026-10-29T01:16:03Z
2026-11-20 → 2026-11-23United AirlinesUA2478 + UA552 / UA2363 + UA2192$421.832026-10-29T01:16:03Z
2026-11-20 · one wayAlaska AirlinesAS489$145.002026-10-29T01:16:03Z
2026-11-20 → 2026-11-23Frontier AirlinesF92276 / F92275$193.882026-10-29T01:16:03Z
2026-11-20 → 2026-11-23Alaska AirlinesAS571 / AS571$327.832026-10-29T01:16:03Z
2026-11-20 → 2026-11-23Alaska AirlinesAS489 / AS571$327.832026-10-29T01:16:03Z
2026-11-27 → 2026-12-04Alaska AirlinesAS571 / AS571$327.832026-10-29T01:16:03Z
2026-11-27 → 2026-12-04Delta Air LinesDL4031 / DL4070$339.582026-10-29T01:16:03Z
2026-11-20 · one wayFrontier AirlinesF92408 + F91923$115.002026-10-29T01:16:03Z
2026-11-20 · one wayAlaska AirlinesAS3087 + AS3380$175.002026-10-29T01:16:03Z
2026-11-20 · one wayDelta Air LinesDL1016 + DL3879$180.002026-10-29T01:16:03Z
2026-11-20 → 2026-11-23Frontier AirlinesF92408 + F91923 / F92275$223.882026-10-29T01:16:03Z
2026-11-27 → 2026-12-04Frontier AirlinesF92408 + F91923 / F92275$234.382026-10-29T01:16:03Z
2026-11-20 → 2026-11-23Alaska AirlinesAS3087 + AS3380 / AS571$355.832026-10-29T01:16:03Z
2026-11-27 → 2026-12-04Alaska AirlinesAS3087 + AS3380 / AS571$365.632026-10-29T01:16:03Z
2026-11-20 → 2026-11-23Delta Air LinesDL1016 + DL3879 / DL4031$367.582026-10-29T01:16:03Z
2026-11-27 → 2026-12-04Southwest AirlinesWN3105 + WN1383 / WN3326 + WN1586$374.832026-10-29T01:16:03Z
2026-11-27 → 2026-12-04Delta Air LinesDL1016 + DL3879 / DL4070$377.382026-10-29T01:16:03Z
2026-11-27 → 2026-12-04American Airlines / Alaska AirlinesAA2073 + AA1841 / AS571$379.132026-10-29T01:16:03Z
2026-11-27 → 2026-12-04United AirlinesUA2478 + UA552 / UA2363 + UA2192$421.832026-10-29T01:16:03Z

2026-11-20 · one way · $85.00

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

2026-11-20 · one way · $145.00

  • Alaska Airlines AS571: SEA 2026-11-20 13:33:00 → ONT 2026-11-20 16:05:00; nonstop; 152 minutes. Local airport times.

2026-11-20 · one way · $150.00

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

2026-11-27 → 2026-12-04 · $193.88

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

2026-11-27 → 2026-12-04 · $327.83

  • Alaska Airlines AS489: SEA 2026-11-27 21:23:00 → ONT 2026-11-27 23:59:00; nonstop; 156 minutes. Local airport times.
  • Alaska Airlines AS571: ONT 2026-12-04 16:09:00 → SEA 2026-12-04 18:56:00; nonstop; 167 minutes. Local airport times.

2026-11-20 → 2026-11-23 · $339.58

  • Delta Air Lines DL4031: SEA 2026-11-20 11:59:00 → ONT 2026-11-20 14:50:00; nonstop; 171 minutes. Local airport times.
  • Delta Air Lines DL4031: ONT 2026-11-23 17:38:00 → SEA 2026-11-23 20:43:00; nonstop; 185 minutes. Local airport times.

2026-11-20 · one way · $165.00

  • Southwest Airlines WN3105 / WN1383: SEA 2026-11-20 08:05:00 → ONT 2026-11-20 12:40:00; 1 stop(s) via SJC; 275 minutes. Local airport times.
    • WN3105: SEA 2026-11-20 08:05:00 → SJC 2026-11-20 10:20:00; layover at SJC: 60 minutes.
    • WN1383: SJC 2026-11-20 11:20:00 → ONT 2026-11-20 12:40:00.

2026-11-20 · one way · $185.00

  • American Airlines AA2073 / AA1841: SEA 2026-11-20 15:00:00 → ONT 2026-11-20 21:52:00; 1 stop(s) via PHX; 412 minutes. Local airport times.
    • AA2073: SEA 2026-11-20 15:00:00 → PHX 2026-11-20 18:52:00; layover at PHX: 163 minutes.
    • AA1841: PHX 2026-11-20 21:35:00 → ONT 2026-11-20 21:52:00.

2026-11-20 · one way · $185.00

  • United Airlines UA2478 / UA552: SEA 2026-11-20 15:24:00 → ONT 2026-11-20 22:53:00; 1 stop(s) via SFO; 449 minutes. Local airport times.
    • UA2478: SEA 2026-11-20 15:24:00 → SFO 2026-11-20 17:45:00; layover at SFO: 225 minutes.
    • UA552: SFO 2026-11-20 21:30:00 → ONT 2026-11-20 22:53:00.

2026-11-20 → 2026-11-23 · $288.88

  • American Airlines AA2073 / AA1841: SEA 2026-11-20 15:00:00 → ONT 2026-11-20 21:52:00; 1 stop(s) via PHX; 412 minutes. Local airport times.
    • AA2073: SEA 2026-11-20 15:00:00 → PHX 2026-11-20 18:52:00; layover at PHX: 163 minutes.
    • AA1841: PHX 2026-11-20 21:35:00 → ONT 2026-11-20 21:52:00.
  • Frontier Airlines F92275: ONT 2026-11-23 06:00:00 → SEA 2026-11-23 09:03:00; nonstop; 183 minutes. Local airport times.

2026-11-20 → 2026-11-23 · $374.83

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

2026-11-20 → 2026-11-23 · $421.83

  • United Airlines UA2478 / UA552: SEA 2026-11-20 15:24:00 → ONT 2026-11-20 22:53:00; 1 stop(s) via SFO; 449 minutes. Local airport times.
    • UA2478: SEA 2026-11-20 15:24:00 → SFO 2026-11-20 17:45:00; layover at SFO: 225 minutes.
    • UA552: SFO 2026-11-20 21:30:00 → ONT 2026-11-20 22:53:00.
  • United Airlines UA2363 / UA2192: ONT 2026-11-23 06:00:00 → SEA 2026-11-23 12:18:00; 1 stop(s) via SFO; 378 minutes. Local airport times.
    • UA2363: ONT 2026-11-23 06:00:00 → SFO 2026-11-23 07:30:00; layover at SFO: 155 minutes.
    • UA2192: SFO 2026-11-23 10:05:00 → SEA 2026-11-23 12:18:00.

2026-11-20 · one way · $145.00

  • Alaska Airlines AS489: SEA 2026-11-20 21:23:00 → ONT 2026-11-20 23:59:00; nonstop; 156 minutes. Local airport times.

2026-11-20 → 2026-11-23 · $193.88

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

2026-11-20 → 2026-11-23 · $327.83

  • Alaska Airlines AS571: SEA 2026-11-20 13:33:00 → ONT 2026-11-20 16:05:00; nonstop; 152 minutes. Local airport times.
  • Alaska Airlines AS571: ONT 2026-11-23 16:09:00 → SEA 2026-11-23 18:56:00; nonstop; 167 minutes. Local airport times.

2026-11-20 → 2026-11-23 · $327.83

  • Alaska Airlines AS489: SEA 2026-11-20 21:23:00 → ONT 2026-11-20 23:59:00; nonstop; 156 minutes. Local airport times.
  • Alaska Airlines AS571: ONT 2026-11-23 16:09:00 → SEA 2026-11-23 18:56:00; nonstop; 167 minutes. Local airport times.

2026-11-27 → 2026-12-04 · $327.83

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

2026-11-27 → 2026-12-04 · $339.58

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

2026-11-20 · one way · $115.00

  • Frontier Airlines F92408 / F91923: SEA 2026-11-20 11:53:00 → ONT 2026-11-20 18:31:00; 1 stop(s) via LAS; 398 minutes. Local airport times.
    • F92408: SEA 2026-11-20 11:53:00 → LAS 2026-11-20 14:32:00; layover at LAS: 173 minutes.
    • F91923: LAS 2026-11-20 17:25:00 → ONT 2026-11-20 18:31:00.

2026-11-20 · one way · $175.00

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

2026-11-20 · one way · $180.00

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

2026-11-20 → 2026-11-23 · $223.88

  • Frontier Airlines F92408 / F91923: SEA 2026-11-20 11:53:00 → ONT 2026-11-20 18:31:00; 1 stop(s) via LAS; 398 minutes. Local airport times.
    • F92408: SEA 2026-11-20 11:53:00 → LAS 2026-11-20 14:32:00; layover at LAS: 173 minutes.
    • F91923: LAS 2026-11-20 17:25:00 → ONT 2026-11-20 18:31:00.
  • Frontier Airlines F92275: ONT 2026-11-23 06:00:00 → SEA 2026-11-23 09:03:00; nonstop; 183 minutes. Local airport times.

2026-11-27 → 2026-12-04 · $234.38

  • Frontier Airlines F92408 / F91923: SEA 2026-11-27 11:53:00 → ONT 2026-11-27 18:31:00; 1 stop(s) via LAS; 398 minutes. Local airport times.
    • F92408: SEA 2026-11-27 11:53:00 → LAS 2026-11-27 14:32:00; layover at LAS: 173 minutes.
    • F91923: LAS 2026-11-27 17:25:00 → ONT 2026-11-27 18:31:00.
  • Frontier Airlines F92275: ONT 2026-12-04 06:00:00 → SEA 2026-12-04 09:03:00; nonstop; 183 minutes. Local airport times.

2026-11-20 → 2026-11-23 · $355.83

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

2026-11-27 → 2026-12-04 · $365.63

  • Alaska Airlines AS3087 / AS3380: SEA 2026-11-27 09:50:00 → ONT 2026-11-27 16:56:00; 1 stop(s) via BOI; 426 minutes. Local airport times.
    • AS3087: SEA 2026-11-27 09:50:00 → BOI 2026-11-27 12:21:00; layover at BOI: 199 minutes.
    • AS3380: BOI 2026-11-27 15:40:00 → ONT 2026-11-27 16:56:00.
  • Alaska Airlines AS571: ONT 2026-12-04 16:09:00 → SEA 2026-12-04 18:56:00; nonstop; 167 minutes. Local airport times.

2026-11-20 → 2026-11-23 · $367.58

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

2026-11-27 → 2026-12-04 · $374.83

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

2026-11-27 → 2026-12-04 · $377.38

  • Delta Air Lines DL1016 / DL3879: SEA 2026-11-27 09:18:00 → ONT 2026-11-27 16:22:00; 1 stop(s) via SLC; 424 minutes. Local airport times.
    • DL1016: SEA 2026-11-27 09:18:00 → SLC 2026-11-27 12:31:00; layover at SLC: 178 minutes.
    • DL3879: SLC 2026-11-27 15:29:00 → ONT 2026-11-27 16:22:00.
  • Delta Air Lines DL4070: ONT 2026-12-04 11:57:00 → SEA 2026-12-04 14:56:00; nonstop; 179 minutes. Local airport times.

2026-11-27 → 2026-12-04 · $379.13

  • American Airlines AA2073 / AA1841: SEA 2026-11-27 15:00:00 → ONT 2026-11-27 21:52:00; 1 stop(s) via PHX; 412 minutes. Local airport times.
    • AA2073: SEA 2026-11-27 15:00:00 → PHX 2026-11-27 18:52:00; layover at PHX: 163 minutes.
    • AA1841: PHX 2026-11-27 21:35:00 → ONT 2026-11-27 21:52:00.
  • Alaska Airlines AS571: ONT 2026-12-04 16:09:00 → SEA 2026-12-04 18:56:00; nonstop; 167 minutes. Local airport times.

2026-11-27 → 2026-12-04 · $421.83

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

More dates for this route