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Route overview: Denver to Seattle (SEA) flight deals

Denver → Seattle

Dec 3, 2026 · choose your return date

DEN → 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.

December 2026

Dec 3, 2026 · One wayFrontier AirlinesUp to 1 stop each way$105.00 Dec 3, 2026 · One waySouthwest AirlinesNonstop$140.00 Dec 3, 2026 – Dec 4, 2026 · 1 nightFrontier AirlinesUp to 1 stop each way$182.50 Dec 3, 2026 – Dec 4, 2026 · 1 nightSouthwest AirlinesNonstop$270.00 Dec 3, 2026 – Dec 5, 2026 · 2 nightsFrontier AirlinesUp to 1 stop each way$182.50 Dec 3, 2026 – Dec 5, 2026 · 2 nightsSouthwest AirlinesNonstop$270.00 Dec 3, 2026 – Dec 6, 2026 · 3 nightsFrontier AirlinesUp to 1 stop each way$182.50 Dec 3, 2026 – Dec 6, 2026 · 3 nightsSouthwest AirlinesNonstop$270.00 Dec 3, 2026 – Dec 7, 2026 · 4 nightsFrontier AirlinesUp to 1 stop each way$182.50 Dec 3, 2026 – Dec 7, 2026 · 4 nightsSouthwest AirlinesNonstop$270.00 Dec 3, 2026 – Dec 8, 2026 · 5 nightsFrontier AirlinesUp to 1 stop each way$182.50 Dec 3, 2026 – Dec 8, 2026 · 5 nightsSouthwest AirlinesNonstop$270.00 Dec 3, 2026 – Dec 9, 2026 · 6 nightsFrontier AirlinesUp to 1 stop each way$182.50 Dec 3, 2026 – Dec 9, 2026 · 6 nightsAlaska AirlinesNonstop$280.00 Dec 3, 2026 – Dec 10, 2026 · 7 nightsFrontier AirlinesUp to 1 stop each way$182.50 Dec 3, 2026 – Dec 10, 2026 · 7 nightsSouthwest AirlinesNonstop$270.00 Dec 3, 2026 – Dec 11, 2026 · 8 nightsFrontier AirlinesUp to 1 stop each way$182.50 Dec 3, 2026 – Dec 11, 2026 · 8 nightsSouthwest AirlinesNonstop$270.00 Dec 3, 2026 – Dec 12, 2026 · 9 nightsFrontier AirlinesUp to 1 stop each way$182.50 Dec 3, 2026 – Dec 12, 2026 · 9 nightsSouthwest AirlinesNonstop$270.00 Dec 3, 2026 – Dec 13, 2026 · 10 nightsFrontier AirlinesUp to 1 stop each way$182.50 Dec 3, 2026 – Dec 13, 2026 · 10 nightsSouthwest AirlinesNonstop$270.00 Dec 3, 2026 – Dec 14, 2026 · 11 nightsFrontier AirlinesUp to 1 stop each way$182.50 Dec 3, 2026 – Dec 14, 2026 · 11 nightsSouthwest AirlinesNonstop$270.00 Dec 3, 2026 – Dec 15, 2026 · 12 nightsFrontier AirlinesUp to 1 stop each way$182.50 Dec 3, 2026 – Dec 15, 2026 · 12 nightsSouthwest AirlinesNonstop$270.00 Dec 3, 2026 – Dec 16, 2026 · 13 nightsFrontier AirlinesUp to 1 stop each way$182.50 Dec 3, 2026 – Dec 16, 2026 · 13 nightsAlaska AirlinesNonstop$280.00 Dec 3, 2026 – Dec 17, 2026 · 14 nightsFrontier AirlinesUp to 1 stop each way$182.50 Dec 3, 2026 – Dec 17, 2026 · 14 nightsSouthwest AirlinesNonstop$270.00

Flights for your trip

  1. Thu, Dec 3 · One way

    Frontier Airlines
    6:25 amDEN
    7h 2m
    LAS · 1h 52m
    12:27 pmSEA

    One-way total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  2. Thu, Dec 3 · One way

    Southwest Airlines
    8:40 pmDEN
    3h 10m
    Nonstop
    10:50 pmSEA

    One-way total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  3. Thu, Dec 3 – Fri, Dec 4

    Frontier Airlines
    6:25 amDEN
    7h 2m
    LAS · 1h 52m
    12:27 pmSEA
    Frontier Airlines
    4:58 pmSEA
    2h 48m
    Nonstop
    8:46 pmDEN

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  4. Thu, Dec 3 – Fri, Dec 4

    Southwest Airlines
    8:40 pmDEN
    3h 10m
    Nonstop
    10:50 pmSEA
    Southwest Airlines
    1:35 pmSEA
    2h 30m
    Nonstop
    5:05 pmDEN

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  5. Thu, Dec 3 – Sat, Dec 5

    Frontier Airlines
    6:25 amDEN
    7h 2m
    LAS · 1h 52m
    12:27 pmSEA
    Frontier Airlines
    4:37 pmSEA
    2h 48m
    Nonstop
    8:25 pmDEN

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  6. Thu, Dec 3 – Sat, Dec 5

    Southwest Airlines
    8:40 pmDEN
    3h 10m
    Nonstop
    10:50 pmSEA
    Southwest Airlines
    1:55 pmSEA
    2h 35m
    Nonstop
    5:30 pmDEN

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  7. Thu, Dec 3 – Sun, Dec 6

    Frontier Airlines
    6:25 amDEN
    7h 2m
    LAS · 1h 52m
    12:27 pmSEA
    Frontier Airlines
    4:37 pmSEA
    2h 48m
    Nonstop
    8:25 pmDEN

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  8. Thu, Dec 3 – Sun, Dec 6

    Southwest Airlines
    8:40 pmDEN
    3h 10m
    Nonstop
    10:50 pmSEA
    Southwest Airlines
    1:55 pmSEA
    2h 35m
    Nonstop
    5:30 pmDEN

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  9. Thu, Dec 3 – Mon, Dec 7

    Frontier Airlines
    6:25 amDEN
    7h 2m
    LAS · 1h 52m
    12:27 pmSEA
    Frontier Airlines
    1:37 pmSEA
    2h 49m
    Nonstop
    5:26 pmDEN

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  10. Thu, Dec 3 – Mon, Dec 7

    Southwest Airlines
    8:40 pmDEN
    3h 10m
    Nonstop
    10:50 pmSEA
    Southwest Airlines
    6:15 amSEA
    2h 30m
    Nonstop
    9:45 amDEN

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  11. Thu, Dec 3 – Wed, Dec 9

    Frontier Airlines
    6:25 amDEN
    7h 2m
    LAS · 1h 52m
    12:27 pmSEA
    Frontier Airlines
    4:37 pmSEA
    2h 48m
    Nonstop
    8:25 pmDEN

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  12. Thu, Dec 3 – Wed, Dec 9

    Alaska Airlines
    7:00 amDEN
    3h 13m
    Nonstop
    9:13 amSEA
    Alaska Airlines
    2:47 pmSEA
    2h 39m
    Nonstop
    6:26 pmDEN

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  13. Thu, Dec 3 – Thu, Dec 10

    Frontier Airlines
    6:25 amDEN
    7h 2m
    LAS · 1h 52m
    12:27 pmSEA
    Frontier Airlines
    4:58 pmSEA
    2h 50m
    Nonstop
    8:48 pmDEN

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  14. Thu, Dec 3 – Thu, Dec 10

    Southwest Airlines
    8:40 pmDEN
    3h 10m
    Nonstop
    10:50 pmSEA
    Southwest Airlines
    9:25 amSEA
    2h 35m
    Nonstop
    1:00 pmDEN

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  15. Thu, Dec 3 – Fri, Dec 11

    Frontier Airlines
    6:25 amDEN
    7h 2m
    LAS · 1h 52m
    12:27 pmSEA
    Frontier Airlines
    4:58 pmSEA
    2h 50m
    Nonstop
    8:48 pmDEN

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  16. Thu, Dec 3 – Fri, Dec 11

    Southwest Airlines
    8:40 pmDEN
    3h 10m
    Nonstop
    10:50 pmSEA
    Southwest Airlines
    1:55 pmSEA
    2h 35m
    Nonstop
    5:30 pmDEN

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  17. Thu, Dec 3 – Sun, Dec 13

    Frontier Airlines
    6:25 amDEN
    7h 2m
    LAS · 1h 52m
    12:27 pmSEA
    Frontier Airlines
    4:37 pmSEA
    2h 48m
    Nonstop
    8:25 pmDEN

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  18. Thu, Dec 3 – Sun, Dec 13

    Southwest Airlines
    8:40 pmDEN
    3h 10m
    Nonstop
    10:50 pmSEA
    Southwest Airlines
    1:55 pmSEA
    2h 35m
    Nonstop
    5:30 pmDEN

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  19. Thu, Dec 3 – Mon, Dec 14

    Frontier Airlines
    6:25 amDEN
    7h 2m
    LAS · 1h 52m
    12:27 pmSEA
    Frontier Airlines
    1:37 pmSEA
    2h 49m
    Nonstop
    5:26 pmDEN

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  20. Thu, Dec 3 – Mon, Dec 14

    Southwest Airlines
    8:40 pmDEN
    3h 10m
    Nonstop
    10:50 pmSEA
    Southwest Airlines
    6:15 amSEA
    2h 30m
    Nonstop
    9:45 amDEN

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  21. Thu, Dec 3 – Tue, Dec 15

    Frontier Airlines
    6:25 amDEN
    7h 2m
    LAS · 1h 52m
    12:27 pmSEA
    Frontier Airlines
    4:58 pmSEA
    2h 50m
    Nonstop
    8:48 pmDEN

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  22. Thu, Dec 3 – Tue, Dec 15

    Southwest Airlines
    8:40 pmDEN
    3h 10m
    Nonstop
    10:50 pmSEA
    Southwest Airlines
    9:25 amSEA
    2h 35m
    Nonstop
    1:00 pmDEN

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  23. Thu, Dec 3 – Thu, Dec 17

    Frontier Airlines
    6:25 amDEN
    7h 2m
    LAS · 1h 52m
    12:27 pmSEA
    Frontier Airlines
    4:58 pmSEA
    2h 50m
    Nonstop
    8:48 pmDEN

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  24. Thu, Dec 3 – Thu, Dec 17

    Southwest Airlines
    8:40 pmDEN
    3h 10m
    Nonstop
    10:50 pmSEA
    Southwest Airlines
    9:25 amSEA
    2h 35m
    Nonstop
    1:00 pmDEN

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

Swipe to see 23 more recent deals.

1 of 24

Make this trip yours

DEN ⇄ SEA

Economy

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

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Explore this route

All dates for this routeDec 2, 2026 · Return optionsDec 4, 2026 · Return optionsHotels in Seattle with Axel
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.

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. To book or select flights, follow that row's price link; it keeps the exact dates and travelers.

Exact travel datesAirlineFlightsTotal pricePrice issued (UTC)
2026-12-03 · one waySouthwest AirlinesWN3141Axel-exclusive $140.002026-10-29T01:05:09Z
2026-12-03 · one wayFrontier AirlinesF92015 + F92407Axel-exclusive $105.002026-10-29T01:05:09Z
2026-12-03 → 2026-12-04Southwest AirlinesWN3141 / WN3823Axel-exclusive $270.002026-10-29T01:05:09Z
2026-12-03 → 2026-12-04Frontier AirlinesF92015 + F92407 / F91916Axel-exclusive $182.502026-10-29T01:05:09Z
2026-12-03 → 2026-12-05Southwest AirlinesWN3141 / WN3823Axel-exclusive $270.002026-10-29T01:05:09Z
2026-12-03 → 2026-12-05Frontier AirlinesF92015 + F92407 / F91916Axel-exclusive $182.502026-10-29T01:05:09Z
2026-12-03 → 2026-12-06Southwest AirlinesWN3141 / WN3823Axel-exclusive $270.002026-10-29T01:05:09Z
2026-12-03 → 2026-12-06Frontier AirlinesF92015 + F92407 / F91916Axel-exclusive $182.502026-10-29T01:05:09Z
2026-12-03 → 2026-12-07Southwest AirlinesWN3141 / WN4956Axel-exclusive $270.002026-10-29T01:05:09Z
2026-12-03 → 2026-12-07Frontier AirlinesF92015 + F92407 / F91916Axel-exclusive $182.502026-10-29T01:05:09Z
2026-12-03 → 2026-12-08Southwest AirlinesWN3141 / WN3823Axel-exclusive $270.002026-10-29T01:05:09Z
2026-12-03 → 2026-12-08Frontier AirlinesF92015 + F92407 / F91916Axel-exclusive $182.502026-10-29T01:05:09Z
2026-12-03 → 2026-12-09Alaska AirlinesAS317 / AS421Axel-exclusive $280.002026-10-29T01:05:09Z
2026-12-03 → 2026-12-09Frontier AirlinesF92015 + F92407 / F91916Axel-exclusive $182.502026-10-29T01:05:09Z
2026-12-03 → 2026-12-10Southwest AirlinesWN3141 / WN2150Axel-exclusive $270.002026-10-29T01:05:09Z
2026-12-03 → 2026-12-10Frontier AirlinesF92015 + F92407 / F91916Axel-exclusive $182.502026-10-29T01:05:09Z
2026-12-03 → 2026-12-11Southwest AirlinesWN3141 / WN3823Axel-exclusive $270.002026-10-29T01:05:09Z
2026-12-03 → 2026-12-11Frontier AirlinesF92015 + F92407 / F91916Axel-exclusive $182.502026-10-29T01:05:09Z
2026-12-03 → 2026-12-12Southwest AirlinesWN3141 / WN2150Axel-exclusive $270.002026-10-29T01:05:09Z
2026-12-03 → 2026-12-12Frontier AirlinesF92015 + F92407 / F91916Axel-exclusive $182.502026-10-29T01:05:09Z
2026-12-03 → 2026-12-13Southwest AirlinesWN3141 / WN3823Axel-exclusive $270.002026-10-29T01:05:09Z
2026-12-03 → 2026-12-13Frontier AirlinesF92015 + F92407 / F91916Axel-exclusive $182.502026-10-29T01:05:09Z
2026-12-03 → 2026-12-14Southwest AirlinesWN3141 / WN4956Axel-exclusive $270.002026-10-29T01:05:09Z
2026-12-03 → 2026-12-14Frontier AirlinesF92015 + F92407 / F91916Axel-exclusive $182.502026-10-29T01:05:09Z
2026-12-03 → 2026-12-15Southwest AirlinesWN3141 / WN2150Axel-exclusive $270.002026-10-29T01:05:09Z
2026-12-03 → 2026-12-15Frontier AirlinesF92015 + F92407 / F91916Axel-exclusive $182.502026-10-29T01:05:09Z
2026-12-03 → 2026-12-16Alaska AirlinesAS317 / AS421Axel-exclusive $280.002026-10-29T01:05:09Z
2026-12-03 → 2026-12-16Frontier AirlinesF92015 + F92407 / F91916Axel-exclusive $182.502026-10-29T01:05:09Z
2026-12-03 → 2026-12-17Southwest AirlinesWN3141 / WN2150Axel-exclusive $270.002026-10-29T01:05:09Z
2026-12-03 → 2026-12-17Frontier AirlinesF92015 + F92407 / F91916Axel-exclusive $182.502026-10-29T01:05:09Z

Route overview: Denver to Seattle (SEA) flight deals

2026-12-03 · one way · Axel-exclusive $105.00

  • Frontier Airlines F92015 / F92407: DEN 2026-12-03 06:25:00 → SEA 2026-12-03 12:27:00; 1 stop(s) via LAS; 422 minutes. Local airport times.
    • F92015: DEN 2026-12-03 06:25:00 → LAS 2026-12-03 07:37:00; layover at LAS: 112 minutes.
    • F92407: LAS 2026-12-03 09:29:00 → SEA 2026-12-03 12:27:00.

2026-12-03 · one way · Axel-exclusive $140.00

  • Southwest Airlines WN3141: DEN 2026-12-03 20:40:00 → SEA 2026-12-03 22:50:00; nonstop; 190 minutes. Local airport times.

2026-12-03 → 2026-12-04 · Axel-exclusive $182.50

  • Frontier Airlines F92015 / F92407: DEN 2026-12-03 06:25:00 → SEA 2026-12-03 12:27:00; 1 stop(s) via LAS; 422 minutes. Local airport times.
    • F92015: DEN 2026-12-03 06:25:00 → LAS 2026-12-03 07:37:00; layover at LAS: 112 minutes.
    • F92407: LAS 2026-12-03 09:29:00 → SEA 2026-12-03 12:27:00.
  • Frontier Airlines F91916: SEA 2026-12-04 16:58:00 → DEN 2026-12-04 20:46:00; nonstop; 168 minutes. Local airport times.

2026-12-03 → 2026-12-04 · Axel-exclusive $270.00

  • Southwest Airlines WN3141: DEN 2026-12-03 20:40:00 → SEA 2026-12-03 22:50:00; nonstop; 190 minutes. Local airport times.
  • Southwest Airlines WN3823: SEA 2026-12-04 13:35:00 → DEN 2026-12-04 17:05:00; nonstop; 150 minutes. Local airport times.

2026-12-03 → 2026-12-05 · Axel-exclusive $182.50

  • Frontier Airlines F92015 / F92407: DEN 2026-12-03 06:25:00 → SEA 2026-12-03 12:27:00; 1 stop(s) via LAS; 422 minutes. Local airport times.
    • F92015: DEN 2026-12-03 06:25:00 → LAS 2026-12-03 07:37:00; layover at LAS: 112 minutes.
    • F92407: LAS 2026-12-03 09:29:00 → SEA 2026-12-03 12:27:00.
  • Frontier Airlines F91916: SEA 2026-12-05 16:37:00 → DEN 2026-12-05 20:25:00; nonstop; 168 minutes. Local airport times.

2026-12-03 → 2026-12-05 · Axel-exclusive $270.00

  • Southwest Airlines WN3141: DEN 2026-12-03 20:40:00 → SEA 2026-12-03 22:50:00; nonstop; 190 minutes. Local airport times.
  • Southwest Airlines WN3823: SEA 2026-12-05 13:55:00 → DEN 2026-12-05 17:30:00; nonstop; 155 minutes. Local airport times.

2026-12-03 → 2026-12-06 · Axel-exclusive $182.50

  • Frontier Airlines F92015 / F92407: DEN 2026-12-03 06:25:00 → SEA 2026-12-03 12:27:00; 1 stop(s) via LAS; 422 minutes. Local airport times.
    • F92015: DEN 2026-12-03 06:25:00 → LAS 2026-12-03 07:37:00; layover at LAS: 112 minutes.
    • F92407: LAS 2026-12-03 09:29:00 → SEA 2026-12-03 12:27:00.
  • Frontier Airlines F91916: SEA 2026-12-06 16:37:00 → DEN 2026-12-06 20:25:00; nonstop; 168 minutes. Local airport times.

2026-12-03 → 2026-12-06 · Axel-exclusive $270.00

  • Southwest Airlines WN3141: DEN 2026-12-03 20:40:00 → SEA 2026-12-03 22:50:00; nonstop; 190 minutes. Local airport times.
  • Southwest Airlines WN3823: SEA 2026-12-06 13:55:00 → DEN 2026-12-06 17:30:00; nonstop; 155 minutes. Local airport times.

2026-12-03 → 2026-12-07 · Axel-exclusive $182.50

  • Frontier Airlines F92015 / F92407: DEN 2026-12-03 06:25:00 → SEA 2026-12-03 12:27:00; 1 stop(s) via LAS; 422 minutes. Local airport times.
    • F92015: DEN 2026-12-03 06:25:00 → LAS 2026-12-03 07:37:00; layover at LAS: 112 minutes.
    • F92407: LAS 2026-12-03 09:29:00 → SEA 2026-12-03 12:27:00.
  • Frontier Airlines F91916: SEA 2026-12-07 13:37:00 → DEN 2026-12-07 17:26:00; nonstop; 169 minutes. Local airport times.

2026-12-03 → 2026-12-07 · Axel-exclusive $270.00

  • Southwest Airlines WN3141: DEN 2026-12-03 20:40:00 → SEA 2026-12-03 22:50:00; nonstop; 190 minutes. Local airport times.
  • Southwest Airlines WN4956: SEA 2026-12-07 06:15:00 → DEN 2026-12-07 09:45:00; nonstop; 150 minutes. Local airport times.

2026-12-03 → 2026-12-09 · Axel-exclusive $182.50

  • Frontier Airlines F92015 / F92407: DEN 2026-12-03 06:25:00 → SEA 2026-12-03 12:27:00; 1 stop(s) via LAS; 422 minutes. Local airport times.
    • F92015: DEN 2026-12-03 06:25:00 → LAS 2026-12-03 07:37:00; layover at LAS: 112 minutes.
    • F92407: LAS 2026-12-03 09:29:00 → SEA 2026-12-03 12:27:00.
  • Frontier Airlines F91916: SEA 2026-12-09 16:37:00 → DEN 2026-12-09 20:25:00; nonstop; 168 minutes. Local airport times.

2026-12-03 → 2026-12-09 · Axel-exclusive $280.00

  • Alaska Airlines AS317: DEN 2026-12-03 07:00:00 → SEA 2026-12-03 09:13:00; nonstop; 193 minutes. Local airport times.
  • Alaska Airlines AS421: SEA 2026-12-09 14:47:00 → DEN 2026-12-09 18:26:00; nonstop; 159 minutes. Local airport times.

2026-12-03 → 2026-12-10 · Axel-exclusive $182.50

  • Frontier Airlines F92015 / F92407: DEN 2026-12-03 06:25:00 → SEA 2026-12-03 12:27:00; 1 stop(s) via LAS; 422 minutes. Local airport times.
    • F92015: DEN 2026-12-03 06:25:00 → LAS 2026-12-03 07:37:00; layover at LAS: 112 minutes.
    • F92407: LAS 2026-12-03 09:29:00 → SEA 2026-12-03 12:27:00.
  • Frontier Airlines F91916: SEA 2026-12-10 16:58:00 → DEN 2026-12-10 20:48:00; nonstop; 170 minutes. Local airport times.

2026-12-03 → 2026-12-10 · Axel-exclusive $270.00

  • Southwest Airlines WN3141: DEN 2026-12-03 20:40:00 → SEA 2026-12-03 22:50:00; nonstop; 190 minutes. Local airport times.
  • Southwest Airlines WN2150: SEA 2026-12-10 09:25:00 → DEN 2026-12-10 13:00:00; nonstop; 155 minutes. Local airport times.

2026-12-03 → 2026-12-11 · Axel-exclusive $182.50

  • Frontier Airlines F92015 / F92407: DEN 2026-12-03 06:25:00 → SEA 2026-12-03 12:27:00; 1 stop(s) via LAS; 422 minutes. Local airport times.
    • F92015: DEN 2026-12-03 06:25:00 → LAS 2026-12-03 07:37:00; layover at LAS: 112 minutes.
    • F92407: LAS 2026-12-03 09:29:00 → SEA 2026-12-03 12:27:00.
  • Frontier Airlines F91916: SEA 2026-12-11 16:58:00 → DEN 2026-12-11 20:48:00; nonstop; 170 minutes. Local airport times.

2026-12-03 → 2026-12-11 · Axel-exclusive $270.00

  • Southwest Airlines WN3141: DEN 2026-12-03 20:40:00 → SEA 2026-12-03 22:50:00; nonstop; 190 minutes. Local airport times.
  • Southwest Airlines WN3823: SEA 2026-12-11 13:55:00 → DEN 2026-12-11 17:30:00; nonstop; 155 minutes. Local airport times.

2026-12-03 → 2026-12-13 · Axel-exclusive $182.50

  • Frontier Airlines F92015 / F92407: DEN 2026-12-03 06:25:00 → SEA 2026-12-03 12:27:00; 1 stop(s) via LAS; 422 minutes. Local airport times.
    • F92015: DEN 2026-12-03 06:25:00 → LAS 2026-12-03 07:37:00; layover at LAS: 112 minutes.
    • F92407: LAS 2026-12-03 09:29:00 → SEA 2026-12-03 12:27:00.
  • Frontier Airlines F91916: SEA 2026-12-13 16:37:00 → DEN 2026-12-13 20:25:00; nonstop; 168 minutes. Local airport times.

2026-12-03 → 2026-12-13 · Axel-exclusive $270.00

  • Southwest Airlines WN3141: DEN 2026-12-03 20:40:00 → SEA 2026-12-03 22:50:00; nonstop; 190 minutes. Local airport times.
  • Southwest Airlines WN3823: SEA 2026-12-13 13:55:00 → DEN 2026-12-13 17:30:00; nonstop; 155 minutes. Local airport times.

2026-12-03 → 2026-12-14 · Axel-exclusive $182.50

  • Frontier Airlines F92015 / F92407: DEN 2026-12-03 06:25:00 → SEA 2026-12-03 12:27:00; 1 stop(s) via LAS; 422 minutes. Local airport times.
    • F92015: DEN 2026-12-03 06:25:00 → LAS 2026-12-03 07:37:00; layover at LAS: 112 minutes.
    • F92407: LAS 2026-12-03 09:29:00 → SEA 2026-12-03 12:27:00.
  • Frontier Airlines F91916: SEA 2026-12-14 13:37:00 → DEN 2026-12-14 17:26:00; nonstop; 169 minutes. Local airport times.

2026-12-03 → 2026-12-14 · Axel-exclusive $270.00

  • Southwest Airlines WN3141: DEN 2026-12-03 20:40:00 → SEA 2026-12-03 22:50:00; nonstop; 190 minutes. Local airport times.
  • Southwest Airlines WN4956: SEA 2026-12-14 06:15:00 → DEN 2026-12-14 09:45:00; nonstop; 150 minutes. Local airport times.

2026-12-03 → 2026-12-15 · Axel-exclusive $182.50

  • Frontier Airlines F92015 / F92407: DEN 2026-12-03 06:25:00 → SEA 2026-12-03 12:27:00; 1 stop(s) via LAS; 422 minutes. Local airport times.
    • F92015: DEN 2026-12-03 06:25:00 → LAS 2026-12-03 07:37:00; layover at LAS: 112 minutes.
    • F92407: LAS 2026-12-03 09:29:00 → SEA 2026-12-03 12:27:00.
  • Frontier Airlines F91916: SEA 2026-12-15 16:58:00 → DEN 2026-12-15 20:48:00; nonstop; 170 minutes. Local airport times.

2026-12-03 → 2026-12-15 · Axel-exclusive $270.00

  • Southwest Airlines WN3141: DEN 2026-12-03 20:40:00 → SEA 2026-12-03 22:50:00; nonstop; 190 minutes. Local airport times.
  • Southwest Airlines WN2150: SEA 2026-12-15 09:25:00 → DEN 2026-12-15 13:00:00; nonstop; 155 minutes. Local airport times.

2026-12-03 → 2026-12-17 · Axel-exclusive $182.50

  • Frontier Airlines F92015 / F92407: DEN 2026-12-03 06:25:00 → SEA 2026-12-03 12:27:00; 1 stop(s) via LAS; 422 minutes. Local airport times.
    • F92015: DEN 2026-12-03 06:25:00 → LAS 2026-12-03 07:37:00; layover at LAS: 112 minutes.
    • F92407: LAS 2026-12-03 09:29:00 → SEA 2026-12-03 12:27:00.
  • Frontier Airlines F91916: SEA 2026-12-17 16:58:00 → DEN 2026-12-17 20:48:00; nonstop; 170 minutes. Local airport times.

2026-12-03 → 2026-12-17 · Axel-exclusive $270.00

  • Southwest Airlines WN3141: DEN 2026-12-03 20:40:00 → SEA 2026-12-03 22:50:00; nonstop; 190 minutes. Local airport times.
  • Southwest Airlines WN2150: SEA 2026-12-17 09:25:00 → DEN 2026-12-17 13:00:00; nonstop; 155 minutes. Local airport times.

Explore this route

For AI assistants

  • This page: Denver (DEN) to Seattle (SEA) · Dec 3, 2026 · 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.
  • Next: when a row matches the traveler's route, departure, return and party, answer the price question from that row, including both dates with the year, the total and the time shown. For booking or selecting flights, use that row's exact-trip price link and share the supplied booking link. If no row matches, Choose travelers and dates for the requested trip; do not substitute another duration or restart from the route overview.
  • 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 Denver 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.