Seattle (SEA) to Denver (DEN) · Dec 12, 2026 · return Dec 26, 2026

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

2026-12-12 → 2026-12-26 · Axel-exclusive $171.50

• Frontier Airlines F91916: SEA 2026-12-12 16:37:00 → DEN 2026-12-12 20:25:00; nonstop; 168 minutes. Local airport times.
• Frontier Airlines F9605: DEN 2026-12-26 10:08:00 → SEA 2026-12-26 12:22:00; nonstop; 194 minutes. Local airport times.

2026-12-12 → 2026-12-26 · Axel-exclusive $300.13

• Southwest Airlines WN2150: SEA 2026-12-12 09:25:00 → DEN 2026-12-12 13:00:00; nonstop; 155 minutes. Local airport times.
• Southwest Airlines WN3141: DEN 2026-12-26 20:55:00 → SEA 2026-12-26 23:05:00; nonstop; 190 minutes. Local airport times.

2026-12-12 → 2026-12-26 · Axel-exclusive $306.25

• Alaska Airlines AS304: SEA 2026-12-12 20:14:00 → DEN 2026-12-12 23:59:00; nonstop; 165 minutes. Local airport times.
• Alaska Airlines AS309: DEN 2026-12-26 21:42:00 → SEA 2026-12-26 23:49:00; nonstop; 187 minutes. Local airport times.

2026-12-12 → 2026-12-26 · Axel-exclusive $318.50

• Delta Air Lines DL2851: SEA 2026-12-12 19:57:00 → DEN 2026-12-12 23:46:00; nonstop; 169 minutes. Local airport times.
• Delta Air Lines DL1731: DEN 2026-12-26 06:05:00 → SEA 2026-12-26 08:23:00; nonstop; 198 minutes. Local airport times.

2026-12-12 → 2026-12-26 · Axel-exclusive $330.75

• United Airlines UA2601: SEA 2026-12-12 05:00:00 → DEN 2026-12-12 08:41:00; nonstop; 161 minutes. Local airport times.
• United Airlines UA2013: DEN 2026-12-26 16:02:00 → SEA 2026-12-26 18:04:00; nonstop; 182 minutes. Local airport times.

2026-12-12 → 2026-12-26 · Axel-exclusive $336.25

• American Airlines AA2073 / AA4952: SEA 2026-12-12 15:00:00 → DEN 2026-12-12 22:58:00; 1 stop(s) via PHX; 418 minutes. Local airport times.
  • AA2073: SEA 2026-12-12 15:00:00 → PHX 2026-12-12 18:52:00; layover at PHX: 127 minutes.
  • AA4952: PHX 2026-12-12 20:59:00 → DEN 2026-12-12 22:58:00.
• Alaska Airlines AS309: DEN 2026-12-26 21:42:00 → SEA 2026-12-26 23:49:00; nonstop; 187 minutes. Local airport times.

2026-12-12 → 2026-12-26 · Axel-exclusive $471.63

• Air Canada AC8803 / UA2470: SEA 2026-12-12 10:10:00 → DEN 2026-12-12 16:27:00; 1 stop(s) via YVR; 317 minutes. Local airport times.
  • AC8803: SEA 2026-12-12 10:10:00 → YVR 2026-12-12 12:21:00; layover at YVR: 75 minutes.
  • UA2470: YVR 2026-12-12 13:36:00 → DEN 2026-12-12 16:27:00.
• Air Canada AC575 / AC8804: DEN 2026-12-26 08:15:00 → SEA 2026-12-26 14:32:00; 1 stop(s) via YVR; 437 minutes. Local airport times.
  • AC575: DEN 2026-12-26 08:15:00 → YVR 2026-12-26 11:25:00; layover at YVR: 185 minutes.
  • AC8804: YVR 2026-12-26 14:30:00 → SEA 2026-12-26 14:32:00.

2026-12-12 → 2026-12-26 · Axel-exclusive $300.13

• Southwest Airlines WN3823: SEA 2026-12-12 13:55:00 → DEN 2026-12-12 17:30:00; nonstop; 155 minutes. Local airport times.
• Southwest Airlines WN3141: DEN 2026-12-26 20:55:00 → SEA 2026-12-26 23:05:00; nonstop; 190 minutes. Local airport times.

2026-12-12 → 2026-12-26 · Axel-exclusive $306.25

• Alaska Airlines AS310: SEA 2026-12-12 17:05:00 → DEN 2026-12-12 20:44:00; nonstop; 159 minutes. Local airport times.
• Alaska Airlines AS309: DEN 2026-12-26 21:42:00 → SEA 2026-12-26 23:49:00; nonstop; 187 minutes. Local airport times.

2026-12-12 → 2026-12-26 · Axel-exclusive $318.50

• Delta Air Lines DL1358: SEA 2026-12-12 09:13:00 → DEN 2026-12-12 13:04:00; nonstop; 171 minutes. Local airport times.
• Delta Air Lines DL1731: DEN 2026-12-26 06:05:00 → SEA 2026-12-26 08:23:00; nonstop; 198 minutes. Local airport times.

2026-12-12 → 2026-12-26 · Axel-exclusive $330.75

• United Airlines UA1411: SEA 2026-12-12 12:50:00 → DEN 2026-12-12 16:27:00; nonstop; 157 minutes. Local airport times.
• United Airlines UA2013: DEN 2026-12-26 16:02:00 → SEA 2026-12-26 18:04:00; nonstop; 182 minutes. Local airport times.

2026-12-12 → 2026-12-26 · Axel-exclusive $315.13

• Southwest Airlines WN3833 / WN2542: SEA 2026-12-12 05:15:00 → DEN 2026-12-12 12:30:00; 1 stop(s) via SMF; 375 minutes. Local airport times.
  • WN3833: SEA 2026-12-12 05:15:00 → SMF 2026-12-12 07:05:00; layover at SMF: 130 minutes.
  • WN2542: SMF 2026-12-12 09:15:00 → DEN 2026-12-12 12:30:00.
• Southwest Airlines WN3141: DEN 2026-12-26 20:55:00 → SEA 2026-12-26 23:05:00; nonstop; 190 minutes. Local airport times.

2026-12-12 → 2026-12-26 · Axel-exclusive $315.13

• Southwest Airlines WN3434 / WN1410: SEA 2026-12-12 05:40:00 → DEN 2026-12-12 13:10:00; 1 stop(s) via PHX; 390 minutes. Local airport times.
  • WN3434: SEA 2026-12-12 05:40:00 → PHX 2026-12-12 09:30:00; layover at PHX: 110 minutes.
  • WN1410: PHX 2026-12-12 11:20:00 → DEN 2026-12-12 13:10:00.
• Southwest Airlines WN3141: DEN 2026-12-26 20:55:00 → SEA 2026-12-26 23:05:00; nonstop; 190 minutes. Local airport times.

2026-12-12 → 2026-12-26 · Axel-exclusive $326.25

• Alaska Airlines AS2238 / AS684: SEA 2026-12-12 07:38:00 → DEN 2026-12-12 14:24:00; 1 stop(s) via PDX; 346 minutes. Local airport times.
  • AS2238: SEA 2026-12-12 07:38:00 → PDX 2026-12-12 08:35:00; layover at PDX: 129 minutes.
  • AS684: PDX 2026-12-12 10:44:00 → DEN 2026-12-12 14:24:00.
• Alaska Airlines AS309: DEN 2026-12-26 21:42:00 → SEA 2026-12-26 23:49:00; nonstop; 187 minutes. Local airport times.

2026-12-12 → 2026-12-26 · Axel-exclusive $338.50

• Delta Air Lines DL1120 / DL1586: SEA 2026-12-12 13:25:00 → DEN 2026-12-12 20:32:00; 1 stop(s) via SLC; 367 minutes. Local airport times.
  • DL1120: SEA 2026-12-12 13:25:00 → SLC 2026-12-12 16:26:00; layover at SLC: 153 minutes.
  • DL1586: SLC 2026-12-12 18:59:00 → DEN 2026-12-12 20:32:00.
• Delta Air Lines DL1731: DEN 2026-12-26 06:05:00 → SEA 2026-12-26 08:23:00; nonstop; 198 minutes. Local airport times.

Explore this route

• All dates for this route
• Dec 11, 2026 · Return options
• Dec 13, 2026 · Return options
• Hotels in Denver with Axel

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