Denver (DEN) to Seattle (SEA), Mar 21, 2027: from $98 one way

Denver (DEN) to Seattle (SEA), Mar 21, 2027: from $98 one way on Axel, checked Nov 14, 2026. Lowest published fare: $98 one way, Axel-exclusive, Frontier Airlines, nonstop, Mar 21, 2027, 1 adult, economy, checked Nov 14, 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: Denver to Seattle (SEA) flight deals

2027-03-21 · one way · Axel-exclusive $98

• Frontier Airlines F94545: DEN 2027-03-21 13:14:00 → SEA 2027-03-21 15:22:00; nonstop; 188 minutes. Local airport times.

2027-03-21 · one way · Axel-exclusive $161

• Southwest Airlines WN1788: DEN 2027-03-21 08:30:00 → SEA 2027-03-21 10:40:00; nonstop; 190 minutes. Local airport times.

2027-03-21 · one way · Axel-exclusive $167

• Alaska Airlines AS317: DEN 2027-03-21 07:00:00 → SEA 2027-03-21 09:13:00; nonstop; 193 minutes. Local airport times.

2027-03-21 · one way · Axel-exclusive $173

• United Airlines UA2651: DEN 2027-03-21 21:10:00 → SEA 2027-03-21 23:16:00; nonstop; 186 minutes. Local airport times.

2027-03-21 · one way · Axel-exclusive $173

• Delta Air Lines DL1731: DEN 2027-03-21 06:05:00 → SEA 2027-03-21 08:23:00; nonstop; 198 minutes. Local airport times.

2027-03-21 · one way · Axel-exclusive $236

• Air Canada AC575 / AC8804: DEN 2027-03-21 08:15:00 → SEA 2027-03-21 14:32:00; 1 stop(s) via YVR; 437 minutes. Local airport times.
  • AC575: DEN 2027-03-21 08:15:00 → YVR 2027-03-21 10:25:00; layover at YVR: 185 minutes.
  • AC8804: YVR 2027-03-21 13:30:00 → SEA 2027-03-21 14:32:00.

2027-03-21 · one way · Axel-exclusive $98

• Frontier Airlines F9605: DEN 2027-03-21 10:08:00 → SEA 2027-03-21 12:22:00; nonstop; 194 minutes. Local airport times.

2027-03-21 · one way · Axel-exclusive $161

• Southwest Airlines WN3141: DEN 2027-03-21 21:00:00 → SEA 2027-03-21 23:10:00; nonstop; 190 minutes. Local airport times.

2027-03-21 · one way · Axel-exclusive $167

• Alaska Airlines AS421: DEN 2027-03-21 19:24:00 → SEA 2027-03-21 21:40:00; nonstop; 196 minutes. Local airport times.

2027-03-21 · one way · Axel-exclusive $173

• United Airlines UA2302: DEN 2027-03-21 11:30:00 → SEA 2027-03-21 13:35:00; nonstop; 185 minutes. Local airport times.

2027-03-21 · one way · Axel-exclusive $173

• Delta Air Lines DL2543: DEN 2027-03-21 18:35:00 → SEA 2027-03-21 20:46:00; nonstop; 191 minutes. Local airport times.

2027-03-21 · one way · Axel-exclusive $121

• Frontier Airlines F92015 / F92407: DEN 2027-03-21 06:25:00 → SEA 2027-03-21 12:27:00; 1 stop(s) via LAS; 422 minutes. Local airport times.
  • F92015: DEN 2027-03-21 06:25:00 → LAS 2027-03-21 07:37:00; layover at LAS: 112 minutes.
  • F92407: LAS 2027-03-21 09:29:00 → SEA 2027-03-21 12:27:00.

2027-03-21 · one way · Axel-exclusive $178

• Southwest Airlines WN1660 / WN948: DEN 2027-03-21 07:30:00 → SEA 2027-03-21 13:00:00; 1 stop(s) via LAS; 390 minutes. Local airport times.
  • WN1660: DEN 2027-03-21 07:30:00 → LAS 2027-03-21 08:30:00; layover at LAS: 90 minutes.
  • WN948: LAS 2027-03-21 10:00:00 → SEA 2027-03-21 13:00:00.

2027-03-21 · one way · Axel-exclusive $178

• Southwest Airlines WN3148 / WN1586: DEN 2027-03-21 13:55:00 → SEA 2027-03-21 18:40:00; 1 stop(s) via SMF; 345 minutes. Local airport times.
  • WN3148: DEN 2027-03-21 13:55:00 → SMF 2027-03-21 15:30:00; layover at SMF: 70 minutes.
  • WN1586: SMF 2027-03-21 16:40:00 → SEA 2027-03-21 18:40:00.

2027-03-21 · one way · Axel-exclusive $184

• Alaska Airlines AS686 / AS3217: DEN 2027-03-21 07:40:00 → SEA 2027-03-21 12:09:00; 1 stop(s) via PDX; 329 minutes. Local airport times.
  • AS686: DEN 2027-03-21 07:40:00 → PDX 2027-03-21 09:39:00; layover at PDX: 75 minutes.
  • AS3217: PDX 2027-03-21 10:54:00 → SEA 2027-03-21 12:09:00.

2027-03-21 · one way · Axel-exclusive $196

• United Airlines UA1086 / AC8810: DEN 2027-03-21 15:53:00 → SEA 2027-03-21 21:57:00; 1 stop(s) via YVR; 424 minutes. Local airport times.
  • UA1086: DEN 2027-03-21 15:53:00 → YVR 2027-03-21 18:04:00; layover at YVR: 166 minutes.
  • AC8810: YVR 2027-03-21 20:50:00 → SEA 2027-03-21 21:57:00.

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
• Mar 20, 2027 · Return options
• Mar 22, 2027 · Return options
• Hotels in Seattle with Axel

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