Seattle (SEA) to Denver (DEN) · Dec 29, 2026 · one way

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

See flights for these dates: each price link opens AI flight search for that row's exact dates and travelers. Select the complete itinerary there.

Route overview: Seattle to Denver (DEN) flight deals

2026-12-29 · one way · Axel-exclusive $101.25

• Frontier Airlines F91916: SEA 2026-12-29 13:37:00 → DEN 2026-12-29 17:26:00; nonstop; 169 minutes. Local airport times.

2026-12-29 · one way · Axel-exclusive $175.50

• Southwest Airlines WN2150: SEA 2026-12-29 09:25:00 → DEN 2026-12-29 13:00:00; nonstop; 155 minutes. Local airport times.

2026-12-29 · one way · Axel-exclusive $182.25

• Alaska Airlines AS421: SEA 2026-12-29 14:47:00 → DEN 2026-12-29 18:26:00; nonstop; 159 minutes. Local airport times.

2026-12-29 · one way · Axel-exclusive $189.00

• Delta Air Lines DL1358: SEA 2026-12-29 08:30:00 → DEN 2026-12-29 12:22:00; nonstop; 172 minutes. Local airport times.

2026-12-29 · one way · Axel-exclusive $195.75

• United Airlines UA1356: SEA 2026-12-29 08:30:00 → DEN 2026-12-29 12:14:00; nonstop; 164 minutes. Local airport times.

2026-12-29 · one way · Axel-exclusive $222.75

• American Airlines AA2073 / AA4952: SEA 2026-12-29 15:00:00 → DEN 2026-12-29 22:58:00; 1 stop(s) via PHX; 418 minutes. Local airport times.
  • AA2073: SEA 2026-12-29 15:00:00 → PHX 2026-12-29 18:52:00; layover at PHX: 127 minutes.
  • AA4952: PHX 2026-12-29 20:59:00 → DEN 2026-12-29 22:58:00.

2026-12-29 · one way · Axel-exclusive $276.75

• Air Canada AC8803 / UA2470: SEA 2026-12-29 10:10:00 → DEN 2026-12-29 16:27:00; 1 stop(s) via YVR; 317 minutes. Local airport times.
  • AC8803: SEA 2026-12-29 10:10:00 → YVR 2026-12-29 12:21:00; layover at YVR: 75 minutes.
  • UA2470: YVR 2026-12-29 13:36:00 → DEN 2026-12-29 16:27:00.

2026-12-29 · one way · Axel-exclusive $175.50

• Southwest Airlines WN3823: SEA 2026-12-29 13:35:00 → DEN 2026-12-29 17:05:00; nonstop; 150 minutes. Local airport times.

2026-12-29 · one way · Axel-exclusive $182.25

• Alaska Airlines AS310: SEA 2026-12-29 19:37:00 → DEN 2026-12-29 23:17:00; nonstop; 160 minutes. Local airport times.

2026-12-29 · one way · Axel-exclusive $189.00

• Delta Air Lines DL2543: SEA 2026-12-29 13:55:00 → DEN 2026-12-29 17:40:00; nonstop; 165 minutes. Local airport times.

2026-12-29 · one way · Axel-exclusive $195.75

• United Airlines UA757: SEA 2026-12-29 14:41:00 → DEN 2026-12-29 18:23:00; nonstop; 162 minutes. Local airport times.

2026-12-29 · one way · Axel-exclusive $195.75

• Southwest Airlines WN3833 / WN2542: SEA 2026-12-29 05:15:00 → DEN 2026-12-29 12:30:00; 1 stop(s) via SMF; 375 minutes. Local airport times.
  • WN3833: SEA 2026-12-29 05:15:00 → SMF 2026-12-29 07:05:00; layover at SMF: 130 minutes.
  • WN2542: SMF 2026-12-29 09:15:00 → DEN 2026-12-29 12:30:00.

2026-12-29 · one way · Axel-exclusive $195.75

• Southwest Airlines WN3434 / WN1410: SEA 2026-12-29 05:40:00 → DEN 2026-12-29 13:10:00; 1 stop(s) via PHX; 390 minutes. Local airport times.
  • WN3434: SEA 2026-12-29 05:40:00 → PHX 2026-12-29 09:30:00; layover at PHX: 110 minutes.
  • WN1410: PHX 2026-12-29 11:20:00 → DEN 2026-12-29 13:10:00.

2026-12-29 · one way · Axel-exclusive $209.25

• Alaska Airlines AS2238 / AS684: SEA 2026-12-29 07:38:00 → DEN 2026-12-29 14:24:00; 1 stop(s) via PDX; 346 minutes. Local airport times.
  • AS2238: SEA 2026-12-29 07:38:00 → PDX 2026-12-29 08:35:00; layover at PDX: 129 minutes.
  • AS684: PDX 2026-12-29 10:44:00 → DEN 2026-12-29 14:24:00.

2026-12-29 · one way · Axel-exclusive $216.00

• Delta Air Lines DL1120 / DL1586: SEA 2026-12-29 13:25:00 → DEN 2026-12-29 20:32:00; 1 stop(s) via SLC; 367 minutes. Local airport times.
  • DL1120: SEA 2026-12-29 13:25:00 → SLC 2026-12-29 16:26:00; layover at SLC: 153 minutes.
  • DL1586: SLC 2026-12-29 18:59:00 → DEN 2026-12-29 20:32:00.

Travelers: prices on this page are totals for 1 adult. For a different party, open this trip for 2 adults · 3 adults · 4 adults · 2 adults + 1 child · 2 adults + 2 children; each link opens AI flight search for these dates and those travelers, and the customer link to share comes from those results.

Explore this route

• All dates for this route
• Dec 28, 2026 · Return options
• Dec 30, 2026 · Return options
• Hotels in Denver with Axel

For AI assistants

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