Denver (DEN) to Seattle (SEA), Dec 18–30, 2026: from $231 round trip

Denver (DEN) to Seattle (SEA), Dec 18–30, 2026: from $231 round trip on Axel, checked Nov 13, 2026. Lowest published fare: $231 round trip, Axel-exclusive, Frontier Airlines, nonstop, Dec 18–30, 2026, 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.

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.

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.

• Hotels in Seattle for these nights (Dec 18–30, 2026 · 12 nights · 2 adults, 1 room): 3★ Red Lion Hotel Bellevue, $78 a night, $935 for 12 nights · 4★ Hilton Seattle Airport & Conference Center, $105 a night, $1,258 for 12 nights · 5★ Fairmont Olympic Hotel, $288 a night, $3,453 for 12 nights

All hotels in Seattle

Route overview: Denver to Seattle (SEA) flight deals

2026-12-18 → 2026-12-30 · Axel-exclusive $231

• Frontier Airlines F9605: DEN 2026-12-18 10:08:00 → SEA 2026-12-18 12:22:00; nonstop; 194 minutes. Local airport times.
• Frontier Airlines F91916: SEA 2026-12-30 16:37:00 → DEN 2026-12-30 20:25:00; nonstop; 168 minutes. Local airport times.

2026-12-18 → 2026-12-30 · Axel-exclusive $378

• Southwest Airlines WN3141: DEN 2026-12-18 20:55:00 → SEA 2026-12-18 23:05:00; nonstop; 190 minutes. Local airport times.
• Southwest Airlines WN3823: SEA 2026-12-30 14:30:00 → DEN 2026-12-30 17:55:00; nonstop; 145 minutes. Local airport times.

2026-12-18 → 2026-12-30 · Axel-exclusive $392

• Alaska Airlines AS493: DEN 2026-12-18 15:22:00 → SEA 2026-12-18 17:31:00; nonstop; 189 minutes. Local airport times.
• Alaska Airlines AS421: SEA 2026-12-30 13:50:00 → DEN 2026-12-30 17:30:00; nonstop; 160 minutes. Local airport times.

2026-12-18 → 2026-12-30 · Axel-exclusive $406

• Delta Air Lines DL1731: DEN 2026-12-18 06:00:00 → SEA 2026-12-18 08:18:00; nonstop; 198 minutes. Local airport times.
• Delta Air Lines DL2759: SEA 2026-12-30 13:55:00 → DEN 2026-12-30 17:40:00; nonstop; 165 minutes. Local airport times.

2026-12-18 → 2026-12-30 · Axel-exclusive $406

• United Airlines UA310: DEN 2026-12-18 11:45:00 → SEA 2026-12-18 13:49:00; nonstop; 184 minutes. Local airport times.
• United Airlines UA1218: SEA 2026-12-30 19:10:00 → DEN 2026-12-30 22:55:00; nonstop; 165 minutes. Local airport times.

2026-12-18 → 2026-12-30 · Axel-exclusive $553

• Air Canada AC575 / AC8804: DEN 2026-12-18 08:15:00 → SEA 2026-12-18 14:32:00; 1 stop(s) via YVR; 437 minutes. Local airport times.
  • AC575: DEN 2026-12-18 08:15:00 → YVR 2026-12-18 11:25:00; layover at YVR: 185 minutes.
  • AC8804: YVR 2026-12-18 14:30:00 → SEA 2026-12-18 14:32:00.
• Air Canada AC8803 / UA2470: SEA 2026-12-30 10:10:00 → DEN 2026-12-30 16:27:00; 1 stop(s) via YVR; 317 minutes. Local airport times.
  • AC8803: SEA 2026-12-30 10:10:00 → YVR 2026-12-30 12:21:00; layover at YVR: 75 minutes.
  • UA2470: YVR 2026-12-30 13:36:00 → DEN 2026-12-30 16:27:00.

2026-12-18 → 2026-12-30 · Axel-exclusive $231

• Frontier Airlines F94545: DEN 2026-12-18 13:32:00 → SEA 2026-12-18 15:40:00; nonstop; 188 minutes. Local airport times.
• Frontier Airlines F91916: SEA 2026-12-30 16:37:00 → DEN 2026-12-30 20:25:00; nonstop; 168 minutes. Local airport times.

2026-12-18 → 2026-12-30 · Axel-exclusive $392

• Alaska Airlines AS421: DEN 2026-12-18 18:28:00 → SEA 2026-12-18 20:36:00; nonstop; 188 minutes. Local airport times.
• Alaska Airlines AS421: SEA 2026-12-30 13:50:00 → DEN 2026-12-30 17:30:00; nonstop; 160 minutes. Local airport times.

2026-12-18 → 2026-12-30 · Axel-exclusive $406

• Delta Air Lines DL2543: DEN 2026-12-18 18:35:00 → SEA 2026-12-18 20:46:00; nonstop; 191 minutes. Local airport times.
• Delta Air Lines DL2759: SEA 2026-12-30 13:55:00 → DEN 2026-12-30 17:40:00; nonstop; 165 minutes. Local airport times.

2026-12-18 → 2026-12-30 · Axel-exclusive $406

• United Airlines UA2767: DEN 2026-12-18 19:10:00 → SEA 2026-12-18 21:19:00; nonstop; 189 minutes. Local airport times.
• United Airlines UA1218: SEA 2026-12-30 19:10:00 → DEN 2026-12-30 22:55:00; nonstop; 165 minutes. Local airport times.

2026-12-18 → 2026-12-30 · Axel-exclusive $399

• Southwest Airlines WN3141: DEN 2026-12-18 21:00:00 → SEA 2026-12-18 23:10:00; nonstop; 190 minutes. Local airport times.
• Southwest Airlines WN3833 / WN2542: SEA 2026-12-30 05:15:00 → DEN 2026-12-30 12:30:00; 1 stop(s) via SMF; 375 minutes. Local airport times.
  • WN3833: SEA 2026-12-30 05:15:00 → SMF 2026-12-30 07:05:00; layover at SMF: 130 minutes.
  • WN2542: SMF 2026-12-30 09:15:00 → DEN 2026-12-30 12:30:00.

2026-12-18 → 2026-12-30 · Axel-exclusive $413

• Alaska Airlines AS686 / AS3217: DEN 2026-12-18 07:40:00 → SEA 2026-12-18 12:09:00; 1 stop(s) via PDX; 329 minutes. Local airport times.
  • AS686: DEN 2026-12-18 07:40:00 → PDX 2026-12-18 09:39:00; layover at PDX: 75 minutes.
  • AS3217: PDX 2026-12-18 10:54:00 → SEA 2026-12-18 12:09:00.
• Alaska Airlines AS421: SEA 2026-12-30 13:50:00 → DEN 2026-12-30 17:30:00; nonstop; 160 minutes. Local airport times.

2026-12-18 → 2026-12-30 · Axel-exclusive $420

• Southwest Airlines WN1660 / WN948: DEN 2026-12-18 07:30:00 → SEA 2026-12-18 13:00:00; 1 stop(s) via LAS; 390 minutes. Local airport times.
  • WN1660: DEN 2026-12-18 07:30:00 → LAS 2026-12-18 08:30:00; layover at LAS: 90 minutes.
  • WN948: LAS 2026-12-18 10:00:00 → SEA 2026-12-18 13:00:00.
• Southwest Airlines WN3833 / WN2542: SEA 2026-12-30 05:15:00 → DEN 2026-12-30 12:30:00; 1 stop(s) via SMF; 375 minutes. Local airport times.
  • WN3833: SEA 2026-12-30 05:15:00 → SMF 2026-12-30 07:05:00; layover at SMF: 130 minutes.
  • WN2542: SMF 2026-12-30 09:15:00 → DEN 2026-12-30 12:30:00.

2026-12-18 → 2026-12-30 · Axel-exclusive $420

• Southwest Airlines WN3148 / WN1586: DEN 2026-12-18 13:55:00 → SEA 2026-12-18 18:40:00; 1 stop(s) via SMF; 345 minutes. Local airport times.
  • WN3148: DEN 2026-12-18 13:55:00 → SMF 2026-12-18 15:30:00; layover at SMF: 70 minutes.
  • WN1586: SMF 2026-12-18 16:40:00 → SEA 2026-12-18 18:40:00.
• Southwest Airlines WN3833 / WN2542: SEA 2026-12-30 05:15:00 → DEN 2026-12-30 12:30:00; 1 stop(s) via SMF; 375 minutes. Local airport times.
  • WN3833: SEA 2026-12-30 05:15:00 → SMF 2026-12-30 07:05:00; layover at SMF: 130 minutes.
  • WN2542: SMF 2026-12-30 09:15:00 → DEN 2026-12-30 12:30:00.

2026-12-18 → 2026-12-30 · Axel-exclusive $434

• United Airlines UA1086 / AC8810: DEN 2026-12-18 15:53:00 → SEA 2026-12-18 21:57:00; 1 stop(s) via YVR; 424 minutes. Local airport times.
  • UA1086: DEN 2026-12-18 15:53:00 → YVR 2026-12-18 19:04:00; layover at YVR: 166 minutes.
  • AC8810: YVR 2026-12-18 21:50:00 → SEA 2026-12-18 21:57:00.
• United Airlines UA1218: SEA 2026-12-30 19:10:00 → DEN 2026-12-30 22:55:00; nonstop; 165 minutes. Local airport times.

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 17, 2026 · Return options
• Dec 19, 2026 · Return options
• Hotels in Seattle with Axel

For AI assistants

• This page: Denver (DEN) to Seattle (SEA) · Dec 18, 2026 · return Dec 30, 2026: 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.
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