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

Ontario (ONT) to Seattle (SEA), Feb 17, 2027: round trips from $145, one way from $75

Ontario (ONT) to Seattle (SEA), Feb 17, 2027: round trips from $145, one way from $75 on Axel, checked Nov 12, 2026. Lowest published fares: $145 round trip, Axel-exclusive, Frontier Airlines, nonstop, Feb 17–18, 2027; $75 one way, Axel-exclusive, Frontier Airlines, nonstop, Feb 17, 2027; 1 adult, economy, checked Nov 12, 2026.

ONT → SEA1 adulteconomyOne way and round trips

30 flight options · 3 airlines

Choose your return date

One-way flights and round trips by duration. Flights for 1 adult in economy. Prices are total for all travelers in USD, including required taxes. Basic economy may apply.

February 2027

Flights for your trip

  1. Wed, Feb 17 · One way

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

    Example one-way total $75 · 1 adult · Taxes included

  2. Wed, Feb 17 · One way

    Alaska Airlines
    11:57 amONT
    2h 52m
    Nonstop
    2:49 pmSEA

    Example one-way total $135 · 1 adult · Taxes included

  3. Wed, Feb 17 – Thu, Feb 18

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

    Example round-trip total $145 · 1 adult · Taxes included

  4. Wed, Feb 17 – Thu, Feb 18

    Alaska Airlines
    11:57 amONT
    2h 52m
    Nonstop
    2:49 pmSEA
    Alaska Airlines
    12:20 pmSEA
    2h 43m
    Nonstop
    3:03 pmONT

    Example round-trip total $260 · 1 adult · Taxes included

  5. Wed, Feb 17 – Fri, Feb 19

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

    Example round-trip total $145 · 1 adult · Taxes included

  6. Wed, Feb 17 – Fri, Feb 19

    Alaska Airlines
    11:57 amONT
    2h 52m
    Nonstop
    2:49 pmSEA
    Alaska Airlines
    12:20 pmSEA
    2h 43m
    Nonstop
    3:03 pmONT

    Example round-trip total $260 · 1 adult · Taxes included

  7. Wed, Feb 17 – Sat, Feb 20

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

    Example round-trip total $145 · 1 adult · Taxes included

  8. Wed, Feb 17 – Sat, Feb 20

    Alaska Airlines
    11:57 amONT
    2h 52m
    Nonstop
    2:49 pmSEA
    Alaska Airlines
    12:20 pmSEA
    2h 43m
    Nonstop
    3:03 pmONT

    Example round-trip total $260 · 1 adult · Taxes included

  9. Wed, Feb 17 – Sun, Feb 21

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

    Example round-trip total $145 · 1 adult · Taxes included

  10. Wed, Feb 17 – Sun, Feb 21

    Alaska Airlines
    11:57 amONT
    2h 52m
    Nonstop
    2:49 pmSEA
    Alaska Airlines
    12:20 pmSEA
    2h 43m
    Nonstop
    3:03 pmONT

    Example round-trip total $260 · 1 adult · Taxes included

  11. Wed, Feb 17 – Tue, Feb 23

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

    Example round-trip total $167.50 · 1 adult · Taxes included

  12. Wed, Feb 17 – Tue, Feb 23

    Alaska Airlines
    11:57 amONT
    2h 52m
    Nonstop
    2:49 pmSEA
    Alaska Airlines
    1:33 pmSEA
    2h 32m
    Nonstop
    4:05 pmONT

    Example round-trip total $260 · 1 adult · Taxes included

  13. Wed, Feb 17 – Wed, Feb 24

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

    Example round-trip total $145 · 1 adult · Taxes included

  14. Wed, Feb 17 – Wed, Feb 24

    Alaska Airlines
    11:57 amONT
    2h 52m
    Nonstop
    2:49 pmSEA
    Alaska Airlines
    12:31 pmSEA
    2h 42m
    Nonstop
    3:13 pmONT

    Example round-trip total $260 · 1 adult · Taxes included

  15. Wed, Feb 17 – Thu, Feb 25

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

    Example round-trip total $145 · 1 adult · Taxes included

  16. Wed, Feb 17 – Thu, Feb 25

    Alaska Airlines
    11:57 amONT
    2h 52m
    Nonstop
    2:49 pmSEA
    Alaska Airlines
    12:20 pmSEA
    2h 43m
    Nonstop
    3:03 pmONT

    Example round-trip total $260 · 1 adult · Taxes included

  17. Wed, Feb 17 – Sat, Feb 27

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

    Example round-trip total $145 · 1 adult · Taxes included

  18. Wed, Feb 17 – Sat, Feb 27

    Alaska Airlines
    11:57 amONT
    2h 52m
    Nonstop
    2:49 pmSEA
    Alaska Airlines
    12:20 pmSEA
    2h 43m
    Nonstop
    3:03 pmONT

    Example round-trip total $260 · 1 adult · Taxes included

  19. Wed, Feb 17 – Sun, Feb 28

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

    Example round-trip total $145 · 1 adult · Taxes included

  20. Wed, Feb 17 – Sun, Feb 28

    Alaska Airlines
    11:57 amONT
    2h 52m
    Nonstop
    2:49 pmSEA
    Alaska Airlines
    12:20 pmSEA
    2h 43m
    Nonstop
    3:03 pmONT

    Example round-trip total $260 · 1 adult · Taxes included

  21. Wed, Feb 17 – Mon, Mar 1

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

    Example round-trip total $145 · 1 adult · Taxes included

  22. Wed, Feb 17 – Mon, Mar 1

    Alaska Airlines
    11:57 amONT
    2h 52m
    Nonstop
    2:49 pmSEA
    Alaska Airlines
    9:50 amSEA
    7h 6m
    BOI · 3h 19m
    4:56 pmONT

    Example round-trip total $270 · 1 adult · Taxes included

  23. Wed, Feb 17 – Wed, Mar 3

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

    Example round-trip total $145 · 1 adult · Taxes included

  24. Wed, Feb 17 – Wed, Mar 3

    Alaska Airlines
    11:57 amONT
    2h 52m
    Nonstop
    2:49 pmSEA
    Alaska Airlines
    12:31 pmSEA
    2h 42m
    Nonstop
    3:13 pmONT

    Example round-trip total $260 · 1 adult · Taxes included

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1 of 24

Make this trip yours

ONT ⇄ SEA

Economy

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Ontario (ONT) to Seattle (SEA), Feb 17, 2027: round trips from $145, one way from $75 on Axel, checked Nov 12, 2026. Lowest published fares: $145 round trip, Axel-exclusive, Frontier Airlines, nonstop, Feb 17–18, 2027; $75 one way, Axel-exclusive, Frontier Airlines, nonstop, Feb 17, 2027; 1 adult, economy, checked Nov 12, 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.

Exact travel datesAirlineFlightsTimes, duration, stopsTotal pricePrice checked
2027-02-17 · one wayFrontier AirlinesF9227506:00:00→09:03:00 3h 03m nonstopAxel-exclusive $75.00Nov 12, 2026
2027-02-17 · one wayAlaska AirlinesAS67711:57:00→14:49:00 2h 52m nonstopAxel-exclusive $135.00Nov 12, 2026
2027-02-17 → 2027-02-18Frontier AirlinesF92275 / F9227606:00:00→09:03:00 3h 03m nonstop · 10:50:00→13:38:00 2h 48m nonstopAxel-exclusive $145.00Nov 12, 2026
2027-02-17 → 2027-02-18Alaska AirlinesAS677 / AS57111:57:00→14:49:00 2h 52m nonstop · 12:20:00→15:03:00 2h 43m nonstopAxel-exclusive $260.00Nov 12, 2026
2027-02-17 → 2027-02-19Frontier AirlinesF92275 / F9227606:00:00→09:03:00 3h 03m nonstop · 10:50:00→13:38:00 2h 48m nonstopAxel-exclusive $145.00Nov 12, 2026
2027-02-17 → 2027-02-19Alaska AirlinesAS677 / AS57111:57:00→14:49:00 2h 52m nonstop · 12:20:00→15:03:00 2h 43m nonstopAxel-exclusive $260.00Nov 12, 2026
2027-02-17 → 2027-02-20Frontier AirlinesF92275 / F9227606:00:00→09:03:00 3h 03m nonstop · 10:50:00→13:38:00 2h 48m nonstopAxel-exclusive $145.00Nov 12, 2026
2027-02-17 → 2027-02-20Alaska AirlinesAS677 / AS57111:57:00→14:49:00 2h 52m nonstop · 12:20:00→15:03:00 2h 43m nonstopAxel-exclusive $260.00Nov 12, 2026
2027-02-17 → 2027-02-21Frontier AirlinesF92275 / F9227606:00:00→09:03:00 3h 03m nonstop · 10:50:00→13:38:00 2h 48m nonstopAxel-exclusive $145.00Nov 12, 2026
2027-02-17 → 2027-02-21Alaska AirlinesAS677 / AS57111:57:00→14:49:00 2h 52m nonstop · 12:20:00→15:03:00 2h 43m nonstopAxel-exclusive $260.00Nov 12, 2026
2027-02-17 → 2027-02-22Frontier AirlinesF92275 / F9227606:00:00→09:03:00 3h 03m nonstop · 10:50:00→13:38:00 2h 48m nonstopAxel-exclusive $145.00Nov 12, 2026
2027-02-17 → 2027-02-22Delta Air LinesDL4031 / DL403117:38:00→20:43:00 3h 05m nonstop · 11:59:00→14:50:00 2h 51m nonstopAxel-exclusive $270.00Nov 12, 2026
2027-02-17 → 2027-02-23Alaska AirlinesAS677 / AS57111:57:00→14:49:00 2h 52m nonstop · 13:33:00→16:05:00 2h 32m nonstopAxel-exclusive $260.00Nov 12, 2026
2027-02-17 → 2027-02-23Frontier AirlinesF92275 / F92408 + F9192306:00:00→09:03:00 3h 03m nonstop · 11:53:00→18:31:00 6h 38m 1 stop via LASAxel-exclusive $167.50Nov 12, 2026
2027-02-17 → 2027-02-24Frontier AirlinesF92275 / F9227606:00:00→09:03:00 3h 03m nonstop · 10:50:00→13:38:00 2h 48m nonstopAxel-exclusive $145.00Nov 12, 2026
2027-02-17 → 2027-02-24Alaska AirlinesAS677 / AS57111:57:00→14:49:00 2h 52m nonstop · 12:31:00→15:13:00 2h 42m nonstopAxel-exclusive $260.00Nov 12, 2026
2027-02-17 → 2027-02-25Frontier AirlinesF92275 / F9227606:00:00→09:03:00 3h 03m nonstop · 10:50:00→13:38:00 2h 48m nonstopAxel-exclusive $145.00Nov 12, 2026
2027-02-17 → 2027-02-25Alaska AirlinesAS677 / AS57111:57:00→14:49:00 2h 52m nonstop · 12:20:00→15:03:00 2h 43m nonstopAxel-exclusive $260.00Nov 12, 2026
2027-02-17 → 2027-02-26Frontier AirlinesF92275 / F9227606:00:00→09:03:00 3h 03m nonstop · 10:50:00→13:38:00 2h 48m nonstopAxel-exclusive $145.00Nov 12, 2026
2027-02-17 → 2027-02-26Alaska AirlinesAS677 / AS57111:57:00→14:49:00 2h 52m nonstop · 12:20:00→15:03:00 2h 43m nonstopAxel-exclusive $260.00Nov 12, 2026
2027-02-17 → 2027-02-27Frontier AirlinesF92275 / F9227606:00:00→09:03:00 3h 03m nonstop · 10:50:00→13:38:00 2h 48m nonstopAxel-exclusive $145.00Nov 12, 2026
2027-02-17 → 2027-02-27Alaska AirlinesAS677 / AS57111:57:00→14:49:00 2h 52m nonstop · 12:20:00→15:03:00 2h 43m nonstopAxel-exclusive $260.00Nov 12, 2026
2027-02-17 → 2027-02-28Frontier AirlinesF92275 / F9227606:00:00→09:03:00 3h 03m nonstop · 10:50:00→13:38:00 2h 48m nonstopAxel-exclusive $145.00Nov 12, 2026
2027-02-17 → 2027-02-28Alaska AirlinesAS677 / AS57111:57:00→14:49:00 2h 52m nonstop · 12:20:00→15:03:00 2h 43m nonstopAxel-exclusive $260.00Nov 12, 2026
2027-02-17 → 2027-03-01Frontier AirlinesF92275 / F9227606:00:00→09:03:00 3h 03m nonstop · 10:50:00→13:38:00 2h 48m nonstopAxel-exclusive $145.00Nov 12, 2026
2027-02-17 → 2027-03-01Alaska AirlinesAS677 / AS3087 + AS338011:57:00→14:49:00 2h 52m nonstop · 09:50:00→16:56:00 7h 06m 1 stop via BOIAxel-exclusive $270.00Nov 12, 2026
2027-02-17 → 2027-03-02Alaska AirlinesAS677 / AS57111:57:00→14:49:00 2h 52m nonstop · 13:33:00→16:05:00 2h 32m nonstopAxel-exclusive $260.00Nov 12, 2026
2027-02-17 → 2027-03-02Frontier AirlinesF92275 / F92408 + F9192306:00:00→09:03:00 3h 03m nonstop · 11:53:00→18:31:00 6h 38m 1 stop via LASAxel-exclusive $167.50Nov 12, 2026
2027-02-17 → 2027-03-03Frontier AirlinesF92275 / F9227606:00:00→09:03:00 3h 03m nonstop · 10:50:00→13:38:00 2h 48m nonstopAxel-exclusive $145.00Nov 12, 2026
2027-02-17 → 2027-03-03Alaska AirlinesAS677 / AS57111:57:00→14:49:00 2h 52m nonstop · 12:31:00→15:13:00 2h 42m nonstopAxel-exclusive $260.00Nov 12, 2026

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.

All hotels in Seattle

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

2027-02-17 · one way · Axel-exclusive $75.00

  • Frontier Airlines F92275: ONT 2027-02-17 06:00:00 → SEA 2027-02-17 09:03:00; nonstop; 183 minutes. Local airport times.

2027-02-17 · one way · Axel-exclusive $135.00

  • Alaska Airlines AS677: ONT 2027-02-17 11:57:00 → SEA 2027-02-17 14:49:00; nonstop; 172 minutes. Local airport times.

2027-02-17 → 2027-02-18 · Axel-exclusive $145.00

  • Frontier Airlines F92275: ONT 2027-02-17 06:00:00 → SEA 2027-02-17 09:03:00; nonstop; 183 minutes. Local airport times.
  • Frontier Airlines F92276: SEA 2027-02-18 10:50:00 → ONT 2027-02-18 13:38:00; nonstop; 168 minutes. Local airport times.

2027-02-17 → 2027-02-18 · Axel-exclusive $260.00

  • Alaska Airlines AS677: ONT 2027-02-17 11:57:00 → SEA 2027-02-17 14:49:00; nonstop; 172 minutes. Local airport times.
  • Alaska Airlines AS571: SEA 2027-02-18 12:20:00 → ONT 2027-02-18 15:03:00; nonstop; 163 minutes. Local airport times.

2027-02-17 → 2027-02-19 · Axel-exclusive $145.00

  • Frontier Airlines F92275: ONT 2027-02-17 06:00:00 → SEA 2027-02-17 09:03:00; nonstop; 183 minutes. Local airport times.
  • Frontier Airlines F92276: SEA 2027-02-19 10:50:00 → ONT 2027-02-19 13:38:00; nonstop; 168 minutes. Local airport times.

2027-02-17 → 2027-02-19 · Axel-exclusive $260.00

  • Alaska Airlines AS677: ONT 2027-02-17 11:57:00 → SEA 2027-02-17 14:49:00; nonstop; 172 minutes. Local airport times.
  • Alaska Airlines AS571: SEA 2027-02-19 12:20:00 → ONT 2027-02-19 15:03:00; nonstop; 163 minutes. Local airport times.

2027-02-17 → 2027-02-20 · Axel-exclusive $145.00

  • Frontier Airlines F92275: ONT 2027-02-17 06:00:00 → SEA 2027-02-17 09:03:00; nonstop; 183 minutes. Local airport times.
  • Frontier Airlines F92276: SEA 2027-02-20 10:50:00 → ONT 2027-02-20 13:38:00; nonstop; 168 minutes. Local airport times.

2027-02-17 → 2027-02-20 · Axel-exclusive $260.00

  • Alaska Airlines AS677: ONT 2027-02-17 11:57:00 → SEA 2027-02-17 14:49:00; nonstop; 172 minutes. Local airport times.
  • Alaska Airlines AS571: SEA 2027-02-20 12:20:00 → ONT 2027-02-20 15:03:00; nonstop; 163 minutes. Local airport times.

2027-02-17 → 2027-02-21 · Axel-exclusive $145.00

  • Frontier Airlines F92275: ONT 2027-02-17 06:00:00 → SEA 2027-02-17 09:03:00; nonstop; 183 minutes. Local airport times.
  • Frontier Airlines F92276: SEA 2027-02-21 10:50:00 → ONT 2027-02-21 13:38:00; nonstop; 168 minutes. Local airport times.

2027-02-17 → 2027-02-21 · Axel-exclusive $260.00

  • Alaska Airlines AS677: ONT 2027-02-17 11:57:00 → SEA 2027-02-17 14:49:00; nonstop; 172 minutes. Local airport times.
  • Alaska Airlines AS571: SEA 2027-02-21 12:20:00 → ONT 2027-02-21 15:03:00; nonstop; 163 minutes. Local airport times.

2027-02-17 → 2027-02-23 · Axel-exclusive $167.50

  • Frontier Airlines F92275: ONT 2027-02-17 06:00:00 → SEA 2027-02-17 09:03:00; nonstop; 183 minutes. Local airport times.
  • Frontier Airlines F92408 / F91923: SEA 2027-02-23 11:53:00 → ONT 2027-02-23 18:31:00; 1 stop(s) via LAS; 398 minutes. Local airport times.
    • F92408: SEA 2027-02-23 11:53:00 → LAS 2027-02-23 14:32:00; layover at LAS: 173 minutes.
    • F91923: LAS 2027-02-23 17:25:00 → ONT 2027-02-23 18:31:00.

2027-02-17 → 2027-02-23 · Axel-exclusive $260.00

  • Alaska Airlines AS677: ONT 2027-02-17 11:57:00 → SEA 2027-02-17 14:49:00; nonstop; 172 minutes. Local airport times.
  • Alaska Airlines AS571: SEA 2027-02-23 13:33:00 → ONT 2027-02-23 16:05:00; nonstop; 152 minutes. Local airport times.

2027-02-17 → 2027-02-24 · Axel-exclusive $145.00

  • Frontier Airlines F92275: ONT 2027-02-17 06:00:00 → SEA 2027-02-17 09:03:00; nonstop; 183 minutes. Local airport times.
  • Frontier Airlines F92276: SEA 2027-02-24 10:50:00 → ONT 2027-02-24 13:38:00; nonstop; 168 minutes. Local airport times.

2027-02-17 → 2027-02-24 · Axel-exclusive $260.00

  • Alaska Airlines AS677: ONT 2027-02-17 11:57:00 → SEA 2027-02-17 14:49:00; nonstop; 172 minutes. Local airport times.
  • Alaska Airlines AS571: SEA 2027-02-24 12:31:00 → ONT 2027-02-24 15:13:00; nonstop; 162 minutes. Local airport times.

2027-02-17 → 2027-02-25 · Axel-exclusive $145.00

  • Frontier Airlines F92275: ONT 2027-02-17 06:00:00 → SEA 2027-02-17 09:03:00; nonstop; 183 minutes. Local airport times.
  • Frontier Airlines F92276: SEA 2027-02-25 10:50:00 → ONT 2027-02-25 13:38:00; nonstop; 168 minutes. Local airport times.

2027-02-17 → 2027-02-25 · Axel-exclusive $260.00

  • Alaska Airlines AS677: ONT 2027-02-17 11:57:00 → SEA 2027-02-17 14:49:00; nonstop; 172 minutes. Local airport times.
  • Alaska Airlines AS571: SEA 2027-02-25 12:20:00 → ONT 2027-02-25 15:03:00; nonstop; 163 minutes. Local airport times.

2027-02-17 → 2027-02-27 · Axel-exclusive $145.00

  • Frontier Airlines F92275: ONT 2027-02-17 06:00:00 → SEA 2027-02-17 09:03:00; nonstop; 183 minutes. Local airport times.
  • Frontier Airlines F92276: SEA 2027-02-27 10:50:00 → ONT 2027-02-27 13:38:00; nonstop; 168 minutes. Local airport times.

2027-02-17 → 2027-02-27 · Axel-exclusive $260.00

  • Alaska Airlines AS677: ONT 2027-02-17 11:57:00 → SEA 2027-02-17 14:49:00; nonstop; 172 minutes. Local airport times.
  • Alaska Airlines AS571: SEA 2027-02-27 12:20:00 → ONT 2027-02-27 15:03:00; nonstop; 163 minutes. Local airport times.

2027-02-17 → 2027-02-28 · Axel-exclusive $145.00

  • Frontier Airlines F92275: ONT 2027-02-17 06:00:00 → SEA 2027-02-17 09:03:00; nonstop; 183 minutes. Local airport times.
  • Frontier Airlines F92276: SEA 2027-02-28 10:50:00 → ONT 2027-02-28 13:38:00; nonstop; 168 minutes. Local airport times.

2027-02-17 → 2027-02-28 · Axel-exclusive $260.00

  • Alaska Airlines AS677: ONT 2027-02-17 11:57:00 → SEA 2027-02-17 14:49:00; nonstop; 172 minutes. Local airport times.
  • Alaska Airlines AS571: SEA 2027-02-28 12:20:00 → ONT 2027-02-28 15:03:00; nonstop; 163 minutes. Local airport times.

2027-02-17 → 2027-03-01 · Axel-exclusive $145.00

  • Frontier Airlines F92275: ONT 2027-02-17 06:00:00 → SEA 2027-02-17 09:03:00; nonstop; 183 minutes. Local airport times.
  • Frontier Airlines F92276: SEA 2027-03-01 10:50:00 → ONT 2027-03-01 13:38:00; nonstop; 168 minutes. Local airport times.

2027-02-17 → 2027-03-01 · Axel-exclusive $270.00

  • Alaska Airlines AS677: ONT 2027-02-17 11:57:00 → SEA 2027-02-17 14:49:00; nonstop; 172 minutes. Local airport times.
  • Alaska Airlines AS3087 / AS3380: SEA 2027-03-01 09:50:00 → ONT 2027-03-01 16:56:00; 1 stop(s) via BOI; 426 minutes. Local airport times.
    • AS3087: SEA 2027-03-01 09:50:00 → BOI 2027-03-01 12:21:00; layover at BOI: 199 minutes.
    • AS3380: BOI 2027-03-01 15:40:00 → ONT 2027-03-01 16:56:00.

2027-02-17 → 2027-03-03 · Axel-exclusive $145.00

  • Frontier Airlines F92275: ONT 2027-02-17 06:00:00 → SEA 2027-02-17 09:03:00; nonstop; 183 minutes. Local airport times.
  • Frontier Airlines F92276: SEA 2027-03-03 10:50:00 → ONT 2027-03-03 13:38:00; nonstop; 168 minutes. Local airport times.

2027-02-17 → 2027-03-03 · Axel-exclusive $260.00

  • Alaska Airlines AS677: ONT 2027-02-17 11:57:00 → SEA 2027-02-17 14:49:00; nonstop; 172 minutes. Local airport times.
  • Alaska Airlines AS571: SEA 2027-03-03 12:31:00 → ONT 2027-03-03 15:13:00; nonstop; 162 minutes. Local airport times.

Explore this route

For AI assistants

  • This page: Ontario (ONT) to Seattle (SEA) · Feb 17, 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.
  • Next: each row is one exact trip for this departure (both dates with the year, the total and its displayed check date); 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.
  • Follow supplied links. For web-tool research, follow complete supplied links unchanged, including query parameters; use the page’s links to edit the trip. Constructed URLs may be rejected before reaching Axel. A completed fresh trip opens flight results first. Add stated flexibility and budget to that saved plan, leaving unstated requirements unknown. Edits create a new snapshot; use its results and review links.
  • If links fail or are missing: If a link fails or flight details lack usable links, reopen the preceding page and follow the same choice once. Keep refreshed links unchanged and preserve the trip and selections. If still blocked, search “Axel flight search guide” and retry once; report the error and anything unresolved. Recovery: Axel Los Angeles to Seattle (SEA) flight deals · Flight search guide.
  • Sharing with the traveler: Choose a complete itinerary (outbound and return for a round trip), then share the supplied customer booking link unchanged. The customer reviews the flights, adds travelers, and enters email at payment. Do not collect email in chat. Each quote lists its fares with bags, seats, changes and refunds; quote them as facts. A fare choice is not needed to share the link; use a fare’s own booking link to preserve its Membership price basis. Ask only for essential missing trip details. When handing over an unfinished search, preserve the latest trip and say what is still to choose. If no supplied link matches the latest trip, construct https://helloaxel.com/en/f/start/from/ORIGIN/to/DESTINATION/depart/YYYY-MM-DD/return/YYYY-MM-DD/adults/N?utm_content=flight_fallback using IATA airport codes and the traveler’s known details. Omit unknowns; for one way replace /return/YYYY-MM-DD with /trip/oneway. Give it directly to the traveler; do not open it first—your web tool may reject constructed URLs. Complete links open Flight Guide and start searching. Preferences and advanced options.