Denver (DEN) to Seattle (SEA), Dec 9–10, 2026: from $165 round trip

Denver (DEN) to Seattle (SEA), Dec 9–10, 2026: from $165 round trip on Axel, checked Nov 13, 2026. Lowest published fare: $165 round trip, Axel-exclusive, Frontier Airlines, nonstop, Dec 9–10, 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 9–10, 2026 · 1 night · 2 adults, 1 room): 3★ Red Lion Hotel Bellevue, $78 a night · 4★ Hilton Seattle Airport & Conference Center, $108 a night · 5★ Fairmont Olympic Hotel, $273 a night

All hotels in Seattle

Route overview: Denver to Seattle (SEA) flight deals

2026-12-09 → 2026-12-10 · Axel-exclusive $165

• Frontier Airlines F94545: DEN 2026-12-09 13:32:00 → SEA 2026-12-09 15:43:00; nonstop; 191 minutes. Local airport times.
• Frontier Airlines F91916: SEA 2026-12-10 16:58:00 → DEN 2026-12-10 20:48:00; nonstop; 170 minutes. Local airport times.

2026-12-09 → 2026-12-10 · Axel-exclusive $270

• Southwest Airlines WN244: DEN 2026-12-09 15:40:00 → SEA 2026-12-09 17:50:00; 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.

2026-12-09 → 2026-12-10 · Axel-exclusive $280

• Alaska Airlines AS317: DEN 2026-12-09 07:00:00 → SEA 2026-12-09 09:13:00; nonstop; 193 minutes. Local airport times.
• Alaska Airlines AS310: SEA 2026-12-10 19:35:00 → DEN 2026-12-10 23:15:00; nonstop; 160 minutes. Local airport times.

2026-12-09 → 2026-12-10 · Axel-exclusive $290

• United Airlines UA2271: DEN 2026-12-09 07:40:00 → SEA 2026-12-09 09:46:00; nonstop; 186 minutes. Local airport times.
• United Airlines UA757: SEA 2026-12-10 16:04:00 → DEN 2026-12-10 19:45:00; nonstop; 161 minutes. Local airport times.

2026-12-09 → 2026-12-10 · Axel-exclusive $290

• Delta Air Lines DL2543: DEN 2026-12-09 18:35:00 → SEA 2026-12-09 20:46:00; nonstop; 191 minutes. Local airport times.
• Delta Air Lines DL1358: SEA 2026-12-10 08:30:00 → DEN 2026-12-10 12:22:00; nonstop; 172 minutes. Local airport times.

2026-12-09 → 2026-12-10 · Axel-exclusive $395

• Air Canada AC575 / AC8804: DEN 2026-12-09 08:15:00 → SEA 2026-12-09 14:32:00; 1 stop(s) via YVR; 437 minutes. Local airport times.
  • AC575: DEN 2026-12-09 08:15:00 → YVR 2026-12-09 11:25:00; layover at YVR: 185 minutes.
  • AC8804: YVR 2026-12-09 14:30:00 → SEA 2026-12-09 14:32:00.
• Air Canada AC8803 / UA2470: SEA 2026-12-10 10:10:00 → DEN 2026-12-10 16:27:00; 1 stop(s) via YVR; 317 minutes. Local airport times.
  • AC8803: SEA 2026-12-10 10:10:00 → YVR 2026-12-10 12:21:00; layover at YVR: 75 minutes.
  • UA2470: YVR 2026-12-10 13:36:00 → DEN 2026-12-10 16:27:00.

2026-12-09 → 2026-12-10 · Axel-exclusive $165

• Frontier Airlines F9605: DEN 2026-12-09 10:08:00 → SEA 2026-12-09 12:22:00; nonstop; 194 minutes. Local airport times.
• Frontier Airlines F91916: SEA 2026-12-10 16:58:00 → DEN 2026-12-10 20:48:00; nonstop; 170 minutes. Local airport times.

2026-12-09 → 2026-12-10 · Axel-exclusive $270

• Southwest Airlines WN1543: DEN 2026-12-09 08:50:00 → SEA 2026-12-09 11:00:00; 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.

2026-12-09 → 2026-12-10 · Axel-exclusive $280

• Alaska Airlines AS309: DEN 2026-12-09 21:42:00 → SEA 2026-12-09 23:49:00; nonstop; 187 minutes. Local airport times.
• Alaska Airlines AS310: SEA 2026-12-10 19:35:00 → DEN 2026-12-10 23:15:00; nonstop; 160 minutes. Local airport times.

2026-12-09 → 2026-12-10 · Axel-exclusive $290

• United Airlines UA2767: DEN 2026-12-09 19:10:00 → SEA 2026-12-09 21:19:00; nonstop; 189 minutes. Local airport times.
• United Airlines UA757: SEA 2026-12-10 16:04:00 → DEN 2026-12-10 19:45:00; nonstop; 161 minutes. Local airport times.

2026-12-09 → 2026-12-10 · Axel-exclusive $290

• Delta Air Lines DL1731: DEN 2026-12-09 06:00:00 → SEA 2026-12-09 08:18:00; nonstop; 198 minutes. Local airport times.
• Delta Air Lines DL1358: SEA 2026-12-10 08:30:00 → DEN 2026-12-10 12:22:00; nonstop; 172 minutes. Local airport times.

2026-12-09 → 2026-12-10 · Axel-exclusive $183

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

2026-12-09 → 2026-12-10 · Axel-exclusive $285

• Southwest Airlines WN1660 / WN948: DEN 2026-12-09 07:30:00 → SEA 2026-12-09 13:00:00; 1 stop(s) via LAS; 390 minutes. Local airport times.
  • WN1660: DEN 2026-12-09 07:30:00 → LAS 2026-12-09 08:30:00; layover at LAS: 90 minutes.
  • WN948: LAS 2026-12-09 10:00:00 → SEA 2026-12-09 13:00:00.
• Southwest Airlines WN2150: SEA 2026-12-10 09:25:00 → DEN 2026-12-10 13:00:00; nonstop; 155 minutes. Local airport times.

2026-12-09 → 2026-12-10 · Axel-exclusive $285

• Southwest Airlines WN3148 / WN1586: DEN 2026-12-09 13:55:00 → SEA 2026-12-09 18:40:00; 1 stop(s) via SMF; 345 minutes. Local airport times.
  • WN3148: DEN 2026-12-09 13:55:00 → SMF 2026-12-09 15:30:00; layover at SMF: 70 minutes.
  • WN1586: SMF 2026-12-09 16:40:00 → SEA 2026-12-09 18:40:00.
• Southwest Airlines WN2150: SEA 2026-12-10 09:25:00 → DEN 2026-12-10 13:00:00; nonstop; 155 minutes. Local airport times.

2026-12-09 → 2026-12-10 · Axel-exclusive $295

• Alaska Airlines AS686 / AS3217: DEN 2026-12-09 07:40:00 → SEA 2026-12-09 12:09:00; 1 stop(s) via PDX; 329 minutes. Local airport times.
  • AS686: DEN 2026-12-09 07:40:00 → PDX 2026-12-09 09:39:00; layover at PDX: 75 minutes.
  • AS3217: PDX 2026-12-09 10:54:00 → SEA 2026-12-09 12:09:00.
• Alaska Airlines AS310: SEA 2026-12-10 19:35:00 → DEN 2026-12-10 23:15:00; nonstop; 160 minutes. Local airport times.

2026-12-09 → 2026-12-10 · Axel-exclusive $310

• United Airlines UA1086 / AC8810: DEN 2026-12-09 15:53:00 → SEA 2026-12-09 21:57:00; 1 stop(s) via YVR; 424 minutes. Local airport times.
  • UA1086: DEN 2026-12-09 15:53:00 → YVR 2026-12-09 19:04:00; layover at YVR: 166 minutes.
  • AC8810: YVR 2026-12-09 21:50:00 → SEA 2026-12-09 21:57:00.
• United Airlines UA757: SEA 2026-12-10 16:04:00 → DEN 2026-12-10 19:45:00; nonstop; 161 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 8, 2026 · Return options
• Dec 10, 2026 · Return options
• Hotels in Seattle with Axel

For AI assistants

• This page: Denver (DEN) to Seattle (SEA) · Dec 9, 2026 · return Dec 10, 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.
• Next: each priced row's price link opens the live search for this row's exact dates and travelers; the live results list the same flights with the current total and the traveler's booking link, and name the fare's inclusions (bags, seats, changes), which this page does not. A changed price or flight shows there. Other dates or travelers are not priced here: Choose travelers and dates prices the traveler's own 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.

Feedback (optional): Missing info · Axel issue