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Route overview: Denver to Seattle (SEA) flight deals

Denver (DEN) to Seattle (SEA), Feb 6, 2027: round trips from $165, one way from $85

Denver (DEN) to Seattle (SEA), Feb 6, 2027: round trips from $165, one way from $85 on Axel, checked Nov 13, 2026. Lowest published fares: $165 round trip, Axel-exclusive, Frontier Airlines, nonstop, Feb 6–7, 2027; $85 one way, Axel-exclusive, Frontier Airlines, nonstop, Feb 6, 2027; 1 adult, economy, checked Nov 13, 2026.

DEN → SEA1 adulteconomyOne way and round trips

30 flight options · 2 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. Sat, Feb 6 · One way

    Frontier Airlines
    10:08 amDEN
    3h 14m
    Nonstop
    12:22 pmSEA

    Example one-way total $85 · 1 adult · Taxes included

  2. Sat, Feb 6 · One way

    Alaska Airlines
    9:42 pmDEN
    3h 7m
    Nonstop
    11:49 pmSEA

    Example one-way total $145 · 1 adult · Taxes included

  3. Sat, Feb 6 – Sun, Feb 7

    Frontier Airlines
    10:08 amDEN
    3h 14m
    Nonstop
    12:22 pmSEA
    Frontier Airlines
    4:37 pmSEA
    2h 48m
    Nonstop
    8:25 pmDEN

    Example round-trip total $165 · 1 adult · Taxes included

  4. Sat, Feb 6 – Sun, Feb 7

    Alaska Airlines
    9:42 pmDEN
    3h 7m
    Nonstop
    11:49 pmSEA
    Alaska Airlines
    1:50 pmSEA
    2h 40m
    Nonstop
    5:30 pmDEN

    Example round-trip total $280 · 1 adult · Taxes included

  5. Sat, Feb 6 – Mon, Feb 8

    Frontier Airlines
    10:08 amDEN
    3h 14m
    Nonstop
    12:22 pmSEA
    Frontier Airlines
    1:37 pmSEA
    2h 49m
    Nonstop
    5:26 pmDEN

    Example round-trip total $165 · 1 adult · Taxes included

  6. Sat, Feb 6 – Mon, Feb 8

    Alaska Airlines
    9:42 pmDEN
    3h 7m
    Nonstop
    11:49 pmSEA
    Alaska Airlines
    1:50 pmSEA
    2h 40m
    Nonstop
    5:30 pmDEN

    Example round-trip total $280 · 1 adult · Taxes included

  7. Sat, Feb 6 – Tue, Feb 9

    Frontier Airlines
    10:08 amDEN
    3h 14m
    Nonstop
    12:22 pmSEA
    Frontier Airlines
    1:24 pmSEA
    2h 49m
    Nonstop
    5:13 pmDEN

    Example round-trip total $165 · 1 adult · Taxes included

  8. Sat, Feb 6 – Tue, Feb 9

    Alaska Airlines
    9:42 pmDEN
    3h 7m
    Nonstop
    11:49 pmSEA
    Alaska Airlines
    7:37 pmSEA
    2h 40m
    Nonstop
    11:17 pmDEN

    Example round-trip total $280 · 1 adult · Taxes included

  9. Sat, Feb 6 – Wed, Feb 10

    Frontier Airlines
    10:08 amDEN
    3h 14m
    Nonstop
    12:22 pmSEA
    Frontier Airlines
    4:37 pmSEA
    2h 48m
    Nonstop
    8:25 pmDEN

    Example round-trip total $165 · 1 adult · Taxes included

  10. Sat, Feb 6 – Wed, Feb 10

    Alaska Airlines
    9:42 pmDEN
    3h 7m
    Nonstop
    11:49 pmSEA
    Alaska Airlines
    1:50 pmSEA
    2h 40m
    Nonstop
    5:30 pmDEN

    Example round-trip total $280 · 1 adult · Taxes included

  11. Sat, Feb 6 – Fri, Feb 12

    Frontier Airlines
    10:08 amDEN
    3h 14m
    Nonstop
    12:22 pmSEA
    Frontier Airlines
    1:24 pmSEA
    2h 49m
    Nonstop
    5:13 pmDEN

    Example round-trip total $177 · 1 adult · Taxes included

  12. Sat, Feb 6 – Fri, Feb 12

    Alaska Airlines
    9:42 pmDEN
    3h 7m
    Nonstop
    11:49 pmSEA
    Alaska Airlines
    7:35 pmSEA
    2h 40m
    Nonstop
    11:15 pmDEN

    Example round-trip total $301 · 1 adult · Taxes included

  13. Sat, Feb 6 – Sat, Feb 13

    Frontier Airlines
    10:08 amDEN
    3h 14m
    Nonstop
    12:22 pmSEA
    Frontier Airlines
    1:37 pmSEA
    2h 49m
    Nonstop
    5:26 pmDEN

    Example round-trip total $177 · 1 adult · Taxes included

  14. Sat, Feb 6 – Sat, Feb 13

    Alaska Airlines
    9:42 pmDEN
    3h 7m
    Nonstop
    11:49 pmSEA
    Alaska Airlines
    7:37 pmSEA
    2h 40m
    Nonstop
    11:17 pmDEN

    Example round-trip total $301 · 1 adult · Taxes included

  15. Sat, Feb 6 – Sun, Feb 14

    Frontier Airlines
    10:08 amDEN
    3h 14m
    Nonstop
    12:22 pmSEA
    Frontier Airlines
    4:37 pmSEA
    2h 48m
    Nonstop
    8:25 pmDEN

    Example round-trip total $177 · 1 adult · Taxes included

  16. Sat, Feb 6 – Sun, Feb 14

    Alaska Airlines
    9:42 pmDEN
    3h 7m
    Nonstop
    11:49 pmSEA
    Alaska Airlines
    1:50 pmSEA
    2h 40m
    Nonstop
    5:30 pmDEN

    Example round-trip total $301 · 1 adult · Taxes included

  17. Sat, Feb 6 – Tue, Feb 16

    Frontier Airlines
    10:08 amDEN
    3h 14m
    Nonstop
    12:22 pmSEA
    Frontier Airlines
    1:24 pmSEA
    2h 49m
    Nonstop
    5:13 pmDEN

    Example round-trip total $177 · 1 adult · Taxes included

  18. Sat, Feb 6 – Tue, Feb 16

    Alaska Airlines
    9:42 pmDEN
    3h 7m
    Nonstop
    11:49 pmSEA
    Alaska Airlines
    7:37 pmSEA
    2h 40m
    Nonstop
    11:17 pmDEN

    Example round-trip total $301 · 1 adult · Taxes included

  19. Sat, Feb 6 – Wed, Feb 17

    Frontier Airlines
    10:08 amDEN
    3h 14m
    Nonstop
    12:22 pmSEA
    Frontier Airlines
    4:37 pmSEA
    2h 48m
    Nonstop
    8:25 pmDEN

    Example round-trip total $165 · 1 adult · Taxes included

  20. Sat, Feb 6 – Wed, Feb 17

    Alaska Airlines
    9:42 pmDEN
    3h 7m
    Nonstop
    11:49 pmSEA
    Alaska Airlines
    1:50 pmSEA
    2h 40m
    Nonstop
    5:30 pmDEN

    Example round-trip total $280 · 1 adult · Taxes included

  21. Sat, Feb 6 – Thu, Feb 18

    Frontier Airlines
    10:08 amDEN
    3h 14m
    Nonstop
    12:22 pmSEA
    Frontier Airlines
    1:24 pmSEA
    2h 49m
    Nonstop
    5:13 pmDEN

    Example round-trip total $165 · 1 adult · Taxes included

  22. Sat, Feb 6 – Thu, Feb 18

    Alaska Airlines
    9:42 pmDEN
    3h 7m
    Nonstop
    11:49 pmSEA
    Alaska Airlines
    3:16 pmSEA
    2h 40m
    Nonstop
    6:56 pmDEN

    Example round-trip total $280 · 1 adult · Taxes included

  23. Sat, Feb 6 – Sat, Feb 20

    Frontier Airlines
    10:08 amDEN
    3h 14m
    Nonstop
    12:22 pmSEA
    Frontier Airlines
    1:37 pmSEA
    2h 49m
    Nonstop
    5:26 pmDEN

    Example round-trip total $165 · 1 adult · Taxes included

  24. Sat, Feb 6 – Sat, Feb 20

    Alaska Airlines
    9:42 pmDEN
    3h 7m
    Nonstop
    11:49 pmSEA
    Alaska Airlines
    7:37 pmSEA
    2h 40m
    Nonstop
    11:17 pmDEN

    Example round-trip total $280 · 1 adult · Taxes included

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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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

Explore this route

For AI assistants: every fare, every link, instructions

Denver (DEN) to Seattle (SEA), Feb 6, 2027: round trips from $165, one way from $85 on Axel, checked Nov 13, 2026. Lowest published fares: $165 round trip, Axel-exclusive, Frontier Airlines, nonstop, Feb 6–7, 2027; $85 one way, Axel-exclusive, Frontier Airlines, nonstop, Feb 6, 2027; 1 adult, economy, checked Nov 13, 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
2027-02-06 · one wayFrontier AirlinesF960510:08:00→12:22:00 3h 14m nonstopAxel-exclusive $85Nov 13, 2026
2027-02-06 · one wayAlaska AirlinesAS30921:42:00→23:49:00 3h 07m nonstopAxel-exclusive $145Nov 13, 2026
2027-02-06 → 2027-02-07Frontier AirlinesF9605 / F9191610:08:00→12:22:00 3h 14m nonstop · 16:37:00→20:25:00 2h 48m nonstopAxel-exclusive $165Nov 13, 2026
2027-02-06 → 2027-02-07Alaska AirlinesAS309 / AS42121:42:00→23:49:00 3h 07m nonstop · 13:50:00→17:30:00 2h 40m nonstopAxel-exclusive $280Nov 13, 2026
2027-02-06 → 2027-02-08Frontier AirlinesF9605 / F9191610:08:00→12:22:00 3h 14m nonstop · 13:37:00→17:26:00 2h 49m nonstopAxel-exclusive $165Nov 13, 2026
2027-02-06 → 2027-02-08Alaska AirlinesAS309 / AS42121:42:00→23:49:00 3h 07m nonstop · 13:50:00→17:30:00 2h 40m nonstopAxel-exclusive $280Nov 13, 2026
2027-02-06 → 2027-02-09Frontier AirlinesF9605 / F9191610:08:00→12:22:00 3h 14m nonstop · 13:24:00→17:13:00 2h 49m nonstopAxel-exclusive $165Nov 13, 2026
2027-02-06 → 2027-02-09Alaska AirlinesAS309 / AS31021:42:00→23:49:00 3h 07m nonstop · 19:37:00→23:17:00 2h 40m nonstopAxel-exclusive $280Nov 13, 2026
2027-02-06 → 2027-02-10Frontier AirlinesF9605 / F9191610:08:00→12:22:00 3h 14m nonstop · 16:37:00→20:25:00 2h 48m nonstopAxel-exclusive $165Nov 13, 2026
2027-02-06 → 2027-02-10Alaska AirlinesAS309 / AS42121:42:00→23:49:00 3h 07m nonstop · 13:50:00→17:30:00 2h 40m nonstopAxel-exclusive $280Nov 13, 2026
2027-02-06 → 2027-02-11Frontier AirlinesF9605 / F9191610:08:00→12:22:00 3h 14m nonstop · 13:24:00→17:13:00 2h 49m nonstopAxel-exclusive $165Nov 13, 2026
2027-02-06 → 2027-02-11Alaska AirlinesAS309 / AS42121:42:00→23:49:00 3h 07m nonstop · 15:16:00→18:56:00 2h 40m nonstopAxel-exclusive $280Nov 13, 2026
2027-02-06 → 2027-02-12Frontier AirlinesF9605 / F9191610:08:00→12:22:00 3h 14m nonstop · 13:24:00→17:13:00 2h 49m nonstopAxel-exclusive $177Nov 13, 2026
2027-02-06 → 2027-02-12Alaska AirlinesAS309 / AS31021:42:00→23:49:00 3h 07m nonstop · 19:35:00→23:15:00 2h 40m nonstopAxel-exclusive $301Nov 13, 2026
2027-02-06 → 2027-02-13Frontier AirlinesF9605 / F9191610:08:00→12:22:00 3h 14m nonstop · 13:37:00→17:26:00 2h 49m nonstopAxel-exclusive $177Nov 13, 2026
2027-02-06 → 2027-02-13Alaska AirlinesAS309 / AS31021:42:00→23:49:00 3h 07m nonstop · 19:37:00→23:17:00 2h 40m nonstopAxel-exclusive $301Nov 13, 2026
2027-02-06 → 2027-02-14Frontier AirlinesF9605 / F9191610:08:00→12:22:00 3h 14m nonstop · 16:37:00→20:25:00 2h 48m nonstopAxel-exclusive $177Nov 13, 2026
2027-02-06 → 2027-02-14Alaska AirlinesAS309 / AS42121:42:00→23:49:00 3h 07m nonstop · 13:50:00→17:30:00 2h 40m nonstopAxel-exclusive $301Nov 13, 2026
2027-02-06 → 2027-02-15Frontier AirlinesF9605 / F9191610:08:00→12:22:00 3h 14m nonstop · 13:37:00→17:26:00 2h 49m nonstopAxel-exclusive $177Nov 13, 2026
2027-02-06 → 2027-02-15Alaska AirlinesAS309 / AS42121:42:00→23:49:00 3h 07m nonstop · 13:50:00→17:30:00 2h 40m nonstopAxel-exclusive $301Nov 13, 2026
2027-02-06 → 2027-02-16Frontier AirlinesF9605 / F9191610:08:00→12:22:00 3h 14m nonstop · 13:24:00→17:13:00 2h 49m nonstopAxel-exclusive $177Nov 13, 2026
2027-02-06 → 2027-02-16Alaska AirlinesAS309 / AS31021:42:00→23:49:00 3h 07m nonstop · 19:37:00→23:17:00 2h 40m nonstopAxel-exclusive $301Nov 13, 2026
2027-02-06 → 2027-02-17Frontier AirlinesF9605 / F9191610:08:00→12:22:00 3h 14m nonstop · 16:37:00→20:25:00 2h 48m nonstopAxel-exclusive $165Nov 13, 2026
2027-02-06 → 2027-02-17Alaska AirlinesAS309 / AS42121:42:00→23:49:00 3h 07m nonstop · 13:50:00→17:30:00 2h 40m nonstopAxel-exclusive $280Nov 13, 2026
2027-02-06 → 2027-02-18Frontier AirlinesF9605 / F9191610:08:00→12:22:00 3h 14m nonstop · 13:24:00→17:13:00 2h 49m nonstopAxel-exclusive $165Nov 13, 2026
2027-02-06 → 2027-02-18Alaska AirlinesAS309 / AS42121:42:00→23:49:00 3h 07m nonstop · 15:16:00→18:56:00 2h 40m nonstopAxel-exclusive $280Nov 13, 2026
2027-02-06 → 2027-02-19Frontier AirlinesF9605 / F9191610:08:00→12:22:00 3h 14m nonstop · 13:24:00→17:13:00 2h 49m nonstopAxel-exclusive $165Nov 13, 2026
2027-02-06 → 2027-02-19Alaska AirlinesAS309 / AS31021:42:00→23:49:00 3h 07m nonstop · 19:35:00→23:15:00 2h 40m nonstopAxel-exclusive $280Nov 13, 2026
2027-02-06 → 2027-02-20Frontier AirlinesF9605 / F9191610:08:00→12:22:00 3h 14m nonstop · 13:37:00→17:26:00 2h 49m nonstopAxel-exclusive $165Nov 13, 2026
2027-02-06 → 2027-02-20Alaska AirlinesAS309 / AS31021:42:00→23:49:00 3h 07m nonstop · 19:37:00→23:17:00 2h 40m nonstopAxel-exclusive $280Nov 13, 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: Denver to Seattle (SEA) flight deals

2027-02-06 · one way · Axel-exclusive $85

  • Frontier Airlines F9605: DEN 2027-02-06 10:08:00 → SEA 2027-02-06 12:22:00; nonstop; 194 minutes. Local airport times.

2027-02-06 · one way · Axel-exclusive $145

  • Alaska Airlines AS309: DEN 2027-02-06 21:42:00 → SEA 2027-02-06 23:49:00; nonstop; 187 minutes. Local airport times.

2027-02-06 → 2027-02-07 · Axel-exclusive $165

  • Frontier Airlines F9605: DEN 2027-02-06 10:08:00 → SEA 2027-02-06 12:22:00; nonstop; 194 minutes. Local airport times.
  • Frontier Airlines F91916: SEA 2027-02-07 16:37:00 → DEN 2027-02-07 20:25:00; nonstop; 168 minutes. Local airport times.

2027-02-06 → 2027-02-07 · Axel-exclusive $280

  • Alaska Airlines AS309: DEN 2027-02-06 21:42:00 → SEA 2027-02-06 23:49:00; nonstop; 187 minutes. Local airport times.
  • Alaska Airlines AS421: SEA 2027-02-07 13:50:00 → DEN 2027-02-07 17:30:00; nonstop; 160 minutes. Local airport times.

2027-02-06 → 2027-02-08 · Axel-exclusive $165

  • Frontier Airlines F9605: DEN 2027-02-06 10:08:00 → SEA 2027-02-06 12:22:00; nonstop; 194 minutes. Local airport times.
  • Frontier Airlines F91916: SEA 2027-02-08 13:37:00 → DEN 2027-02-08 17:26:00; nonstop; 169 minutes. Local airport times.

2027-02-06 → 2027-02-08 · Axel-exclusive $280

  • Alaska Airlines AS309: DEN 2027-02-06 21:42:00 → SEA 2027-02-06 23:49:00; nonstop; 187 minutes. Local airport times.
  • Alaska Airlines AS421: SEA 2027-02-08 13:50:00 → DEN 2027-02-08 17:30:00; nonstop; 160 minutes. Local airport times.

2027-02-06 → 2027-02-09 · Axel-exclusive $165

  • Frontier Airlines F9605: DEN 2027-02-06 10:08:00 → SEA 2027-02-06 12:22:00; nonstop; 194 minutes. Local airport times.
  • Frontier Airlines F91916: SEA 2027-02-09 13:24:00 → DEN 2027-02-09 17:13:00; nonstop; 169 minutes. Local airport times.

2027-02-06 → 2027-02-09 · Axel-exclusive $280

  • Alaska Airlines AS309: DEN 2027-02-06 21:42:00 → SEA 2027-02-06 23:49:00; nonstop; 187 minutes. Local airport times.
  • Alaska Airlines AS310: SEA 2027-02-09 19:37:00 → DEN 2027-02-09 23:17:00; nonstop; 160 minutes. Local airport times.

2027-02-06 → 2027-02-10 · Axel-exclusive $165

  • Frontier Airlines F9605: DEN 2027-02-06 10:08:00 → SEA 2027-02-06 12:22:00; nonstop; 194 minutes. Local airport times.
  • Frontier Airlines F91916: SEA 2027-02-10 16:37:00 → DEN 2027-02-10 20:25:00; nonstop; 168 minutes. Local airport times.

2027-02-06 → 2027-02-10 · Axel-exclusive $280

  • Alaska Airlines AS309: DEN 2027-02-06 21:42:00 → SEA 2027-02-06 23:49:00; nonstop; 187 minutes. Local airport times.
  • Alaska Airlines AS421: SEA 2027-02-10 13:50:00 → DEN 2027-02-10 17:30:00; nonstop; 160 minutes. Local airport times.

2027-02-06 → 2027-02-12 · Axel-exclusive $177

  • Frontier Airlines F9605: DEN 2027-02-06 10:08:00 → SEA 2027-02-06 12:22:00; nonstop; 194 minutes. Local airport times.
  • Frontier Airlines F91916: SEA 2027-02-12 13:24:00 → DEN 2027-02-12 17:13:00; nonstop; 169 minutes. Local airport times.

2027-02-06 → 2027-02-12 · Axel-exclusive $301

  • Alaska Airlines AS309: DEN 2027-02-06 21:42:00 → SEA 2027-02-06 23:49:00; nonstop; 187 minutes. Local airport times.
  • Alaska Airlines AS310: SEA 2027-02-12 19:35:00 → DEN 2027-02-12 23:15:00; nonstop; 160 minutes. Local airport times.

2027-02-06 → 2027-02-13 · Axel-exclusive $177

  • Frontier Airlines F9605: DEN 2027-02-06 10:08:00 → SEA 2027-02-06 12:22:00; nonstop; 194 minutes. Local airport times.
  • Frontier Airlines F91916: SEA 2027-02-13 13:37:00 → DEN 2027-02-13 17:26:00; nonstop; 169 minutes. Local airport times.

2027-02-06 → 2027-02-13 · Axel-exclusive $301

  • Alaska Airlines AS309: DEN 2027-02-06 21:42:00 → SEA 2027-02-06 23:49:00; nonstop; 187 minutes. Local airport times.
  • Alaska Airlines AS310: SEA 2027-02-13 19:37:00 → DEN 2027-02-13 23:17:00; nonstop; 160 minutes. Local airport times.

2027-02-06 → 2027-02-14 · Axel-exclusive $177

  • Frontier Airlines F9605: DEN 2027-02-06 10:08:00 → SEA 2027-02-06 12:22:00; nonstop; 194 minutes. Local airport times.
  • Frontier Airlines F91916: SEA 2027-02-14 16:37:00 → DEN 2027-02-14 20:25:00; nonstop; 168 minutes. Local airport times.

2027-02-06 → 2027-02-14 · Axel-exclusive $301

  • Alaska Airlines AS309: DEN 2027-02-06 21:42:00 → SEA 2027-02-06 23:49:00; nonstop; 187 minutes. Local airport times.
  • Alaska Airlines AS421: SEA 2027-02-14 13:50:00 → DEN 2027-02-14 17:30:00; nonstop; 160 minutes. Local airport times.

2027-02-06 → 2027-02-16 · Axel-exclusive $177

  • Frontier Airlines F9605: DEN 2027-02-06 10:08:00 → SEA 2027-02-06 12:22:00; nonstop; 194 minutes. Local airport times.
  • Frontier Airlines F91916: SEA 2027-02-16 13:24:00 → DEN 2027-02-16 17:13:00; nonstop; 169 minutes. Local airport times.

2027-02-06 → 2027-02-16 · Axel-exclusive $301

  • Alaska Airlines AS309: DEN 2027-02-06 21:42:00 → SEA 2027-02-06 23:49:00; nonstop; 187 minutes. Local airport times.
  • Alaska Airlines AS310: SEA 2027-02-16 19:37:00 → DEN 2027-02-16 23:17:00; nonstop; 160 minutes. Local airport times.

2027-02-06 → 2027-02-17 · Axel-exclusive $165

  • Frontier Airlines F9605: DEN 2027-02-06 10:08:00 → SEA 2027-02-06 12:22:00; nonstop; 194 minutes. Local airport times.
  • Frontier Airlines F91916: SEA 2027-02-17 16:37:00 → DEN 2027-02-17 20:25:00; nonstop; 168 minutes. Local airport times.

2027-02-06 → 2027-02-17 · Axel-exclusive $280

  • Alaska Airlines AS309: DEN 2027-02-06 21:42:00 → SEA 2027-02-06 23:49:00; nonstop; 187 minutes. Local airport times.
  • Alaska Airlines AS421: SEA 2027-02-17 13:50:00 → DEN 2027-02-17 17:30:00; nonstop; 160 minutes. Local airport times.

2027-02-06 → 2027-02-18 · Axel-exclusive $165

  • Frontier Airlines F9605: DEN 2027-02-06 10:08:00 → SEA 2027-02-06 12:22:00; nonstop; 194 minutes. Local airport times.
  • Frontier Airlines F91916: SEA 2027-02-18 13:24:00 → DEN 2027-02-18 17:13:00; nonstop; 169 minutes. Local airport times.

2027-02-06 → 2027-02-18 · Axel-exclusive $280

  • Alaska Airlines AS309: DEN 2027-02-06 21:42:00 → SEA 2027-02-06 23:49:00; nonstop; 187 minutes. Local airport times.
  • Alaska Airlines AS421: SEA 2027-02-18 15:16:00 → DEN 2027-02-18 18:56:00; nonstop; 160 minutes. Local airport times.

2027-02-06 → 2027-02-20 · Axel-exclusive $165

  • Frontier Airlines F9605: DEN 2027-02-06 10:08:00 → SEA 2027-02-06 12:22:00; nonstop; 194 minutes. Local airport times.
  • Frontier Airlines F91916: SEA 2027-02-20 13:37:00 → DEN 2027-02-20 17:26:00; nonstop; 169 minutes. Local airport times.

2027-02-06 → 2027-02-20 · Axel-exclusive $280

  • Alaska Airlines AS309: DEN 2027-02-06 21:42:00 → SEA 2027-02-06 23:49:00; nonstop; 187 minutes. Local airport times.
  • Alaska Airlines AS310: SEA 2027-02-20 19:37:00 → DEN 2027-02-20 23:17:00; nonstop; 160 minutes. Local airport times.

Explore this route

For AI assistants

  • This page: Denver (DEN) to Seattle (SEA) · Feb 6, 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 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.