Denver (DEN) to Seattle (SEA), Jan 18–21, 2027: from $165 round trip

Lowest published fare: $165 round trip, Axel-exclusive, Frontier Airlines, nonstop, Jan 18–21, 2027, 1 adult, economy, checked Oct 29, 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

2027-01-18 → 2027-01-21 · Axel-exclusive $165.00

• Frontier Airlines F94545: DEN 2027-01-18 13:32:00 → SEA 2027-01-18 15:43:00; nonstop; 191 minutes. Local airport times.
• Frontier Airlines F91916: SEA 2027-01-21 13:24:00 → DEN 2027-01-21 17:13:00; nonstop; 169 minutes. Local airport times.

2027-01-18 → 2027-01-21 · Axel-exclusive $270.00

• Southwest Airlines WN244: DEN 2027-01-18 15:40:00 → SEA 2027-01-18 17:50:00; nonstop; 190 minutes. Local airport times.
• Southwest Airlines WN2150: SEA 2027-01-21 09:25:00 → DEN 2027-01-21 13:00:00; nonstop; 155 minutes. Local airport times.

2027-01-18 → 2027-01-21 · Axel-exclusive $280.00

• Alaska Airlines AS421: DEN 2027-01-18 19:24:00 → SEA 2027-01-18 21:40:00; nonstop; 196 minutes. Local airport times.
• Alaska Airlines AS421: SEA 2027-01-21 15:16:00 → DEN 2027-01-21 18:56:00; nonstop; 160 minutes. Local airport times.

2027-01-18 → 2027-01-21 · Axel-exclusive $290.00

• United Airlines UA360: DEN 2027-01-18 19:10:00 → SEA 2027-01-18 21:17:00; nonstop; 187 minutes. Local airport times.
• United Airlines UA757: SEA 2027-01-21 16:04:00 → DEN 2027-01-21 19:45:00; nonstop; 161 minutes. Local airport times.

2027-01-18 → 2027-01-21 · Axel-exclusive $290.00

• Delta Air Lines DL1731: DEN 2027-01-18 06:05:00 → SEA 2027-01-18 08:23:00; nonstop; 198 minutes. Local airport times.
• Delta Air Lines DL1358: SEA 2027-01-21 08:30:00 → DEN 2027-01-21 12:22:00; nonstop; 172 minutes. Local airport times.

2027-01-18 → 2027-01-21 · Axel-exclusive $395.00

• Air Canada AC575 / AC8804: DEN 2027-01-18 08:15:00 → SEA 2027-01-18 14:32:00; 1 stop(s) via YVR; 437 minutes. Local airport times.
  • AC575: DEN 2027-01-18 08:15:00 → YVR 2027-01-18 11:25:00; layover at YVR: 185 minutes.
  • AC8804: YVR 2027-01-18 14:30:00 → SEA 2027-01-18 14:32:00.
• Air Canada AC8803 / UA2470: SEA 2027-01-21 10:10:00 → DEN 2027-01-21 16:27:00; 1 stop(s) via YVR; 317 minutes. Local airport times.
  • AC8803: SEA 2027-01-21 10:10:00 → YVR 2027-01-21 12:21:00; layover at YVR: 75 minutes.
  • UA2470: YVR 2027-01-21 13:36:00 → DEN 2027-01-21 16:27:00.

2027-01-18 → 2027-01-21 · Axel-exclusive $165.00

• Frontier Airlines F9605: DEN 2027-01-18 10:08:00 → SEA 2027-01-18 12:22:00; nonstop; 194 minutes. Local airport times.
• Frontier Airlines F91916: SEA 2027-01-21 13:24:00 → DEN 2027-01-21 17:13:00; nonstop; 169 minutes. Local airport times.

2027-01-18 → 2027-01-21 · Axel-exclusive $270.00

• Southwest Airlines WN3141: DEN 2027-01-18 21:00:00 → SEA 2027-01-18 23:10:00; nonstop; 190 minutes. Local airport times.
• Southwest Airlines WN2150: SEA 2027-01-21 09:25:00 → DEN 2027-01-21 13:00:00; nonstop; 155 minutes. Local airport times.

2027-01-18 → 2027-01-21 · Axel-exclusive $280.00

• Alaska Airlines AS493: DEN 2027-01-18 15:22:00 → SEA 2027-01-18 17:31:00; nonstop; 189 minutes. Local airport times.
• Alaska Airlines AS421: SEA 2027-01-21 15:16:00 → DEN 2027-01-21 18:56:00; nonstop; 160 minutes. Local airport times.

2027-01-18 → 2027-01-21 · Axel-exclusive $290.00

• Delta Air Lines DL2543: DEN 2027-01-18 18:35:00 → SEA 2027-01-18 20:46:00; nonstop; 191 minutes. Local airport times.
• Delta Air Lines DL1358: SEA 2027-01-21 08:30:00 → DEN 2027-01-21 12:22:00; nonstop; 172 minutes. Local airport times.

2027-01-18 → 2027-01-21 · Axel-exclusive $290.00

• United Airlines UA2271: DEN 2027-01-18 07:40:00 → SEA 2027-01-18 09:49:00; nonstop; 189 minutes. Local airport times.
• United Airlines UA757: SEA 2027-01-21 16:04:00 → DEN 2027-01-21 19:45:00; nonstop; 161 minutes. Local airport times.

2027-01-18 → 2027-01-21 · Axel-exclusive $182.50

• Frontier Airlines F92015 / F92407: DEN 2027-01-18 06:25:00 → SEA 2027-01-18 12:27:00; 1 stop(s) via LAS; 422 minutes. Local airport times.
  • F92015: DEN 2027-01-18 06:25:00 → LAS 2027-01-18 07:37:00; layover at LAS: 112 minutes.
  • F92407: LAS 2027-01-18 09:29:00 → SEA 2027-01-18 12:27:00.
• Frontier Airlines F91916: SEA 2027-01-21 13:24:00 → DEN 2027-01-21 17:13:00; nonstop; 169 minutes. Local airport times.

2027-01-18 → 2027-01-21 · Axel-exclusive $285.00

• Southwest Airlines WN3148 / WN1586: DEN 2027-01-18 13:55:00 → SEA 2027-01-18 18:40:00; 1 stop(s) via SMF; 345 minutes. Local airport times.
  • WN3148: DEN 2027-01-18 13:55:00 → SMF 2027-01-18 15:30:00; layover at SMF: 70 minutes.
  • WN1586: SMF 2027-01-18 16:40:00 → SEA 2027-01-18 18:40:00.
• Southwest Airlines WN2150: SEA 2027-01-21 09:25:00 → DEN 2027-01-21 13:00:00; nonstop; 155 minutes. Local airport times.

2027-01-18 → 2027-01-21 · Axel-exclusive $285.00

• Southwest Airlines WN1660 / WN948: DEN 2027-01-18 07:30:00 → SEA 2027-01-18 13:00:00; 1 stop(s) via LAS; 390 minutes. Local airport times.
  • WN1660: DEN 2027-01-18 07:30:00 → LAS 2027-01-18 08:30:00; layover at LAS: 90 minutes.
  • WN948: LAS 2027-01-18 10:00:00 → SEA 2027-01-18 13:00:00.
• Southwest Airlines WN2150: SEA 2027-01-21 09:25:00 → DEN 2027-01-21 13:00:00; nonstop; 155 minutes. Local airport times.

2027-01-18 → 2027-01-21 · Axel-exclusive $295.00

• Alaska Airlines AS686 / AS3217: DEN 2027-01-18 07:40:00 → SEA 2027-01-18 12:09:00; 1 stop(s) via PDX; 329 minutes. Local airport times.
  • AS686: DEN 2027-01-18 07:40:00 → PDX 2027-01-18 09:39:00; layover at PDX: 75 minutes.
  • AS3217: PDX 2027-01-18 10:54:00 → SEA 2027-01-18 12:09:00.
• Alaska Airlines AS421: SEA 2027-01-21 15:16:00 → DEN 2027-01-21 18:56:00; nonstop; 160 minutes. Local airport times.

2027-01-18 → 2027-01-21 · Axel-exclusive $310.00

• United Airlines UA1086 / AC8810: DEN 2027-01-18 15:53:00 → SEA 2027-01-18 21:57:00; 1 stop(s) via YVR; 424 minutes. Local airport times.
  • UA1086: DEN 2027-01-18 15:53:00 → YVR 2027-01-18 19:04:00; layover at YVR: 166 minutes.
  • AC8810: YVR 2027-01-18 21:50:00 → SEA 2027-01-18 21:57:00.
• United Airlines UA757: SEA 2027-01-21 16:04:00 → DEN 2027-01-21 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
• Jan 17, 2027 · Return options
• Jan 19, 2027 · Return options
• Hotels in Seattle with Axel

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