DEN → SEADenver to Seattle

live

Direct flights from Denver (DEN) to Seattle (SEA): 35 nonstop departures observed each week across 5 airlines. 89% of the last 19 operated flights arrived within 15 minutes of schedule. The median arrival is 4 minutes late. No cancellations were recorded across the 19 tracked flights. The nonstop covers 1,645 km, an estimated 2 hours 37 minutes in the air. Measured by Pro Flight Search from live flight boards at Denver and Seattle. Updated 28 October 2026 at 17:22 UTC.

Today, DEN → SEA

Wed 28 Oct · local times
  1. 06:00 DL1731Delta Air Lines Left 05:49 Landed 08:10
  2. 07:07 AS317Alaska Airlines Left 07:00 Landed 09:10
  3. 07:40 UA2271United Airlines Left 07:33 Landed 09:47
  4. 08:50 WN4392Southwest Airlines Left 08:53 SEA est. 10:39In the air · sched 10:50
  5. 11:50 UA2302United On scheduleGate B46 SEA est. 13:37sched 13:54
  6. 12:00 AS682Alaska On scheduleGate A46 SEA 13:59scheduled
  7. 12:20 WN4538Southwest On scheduleGate C55 SEA est. 14:09sched 14:20
  8. 13:04 F91175Frontier On scheduleGate A81 SEA 15:12scheduled
  9. 13:55 DL1358Delta Air Lines On scheduleGate A49 SEA est. 15:48sched 16:08
  10. 15:30 AS567Alaska On scheduleGate A46 SEA 17:29scheduled
  11. 15:53 UA2013United On scheduleGate A18 SEA 17:57scheduled
  12. 17:05 WN183Southwest On scheduleGate C43 SEA 19:05scheduled
  13. 17:57 AS615Alaska On scheduleGate A44 SEA est. 20:02sched 19:58
  14. 18:42 DL2543Delta Air Lines On scheduleGate A53 SEA est. 20:38sched 20:48
  15. 19:10 UA2767United On scheduleGate A40 SEA 21:19scheduled
  16. 20:40 WN4358Southwest On scheduleGate C44 SEA 22:40scheduled
  17. 21:07 UA2651United On scheduleGate A21 SEA 23:15scheduled
  18. · WN175Southwest On schedule SEA 21:45scheduled
  19. · WN875Southwest On schedule SEA 14:55scheduled

Checked DEN board 11:08 · SEA board 10:22

DEN Denver smooth · +0
SEA Seattle disrupted · +60
1,645 km · ~2h 37m est.
dep bank 06:00–22:3535x weekly
Runs reliable · 5 airlines · 35x weekly · nonstop
89% on time

of the last 19 operated DEN → SEA flights arrived within 15 minutes

Median arrival delay is +4 min. 0 of 19 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →

Median arrival+4 minacross the last 19 operated legs
Flight time~2h 37mestimated from route distance
Weekly departures35x5 direct airlines on the leg
Cancelled0.0%recent route rate · 0 of 19

The week

scheduled departures · origin local time
06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Alaska AirlinesDelta Air LinesFrontier AirlinesSouthwest Airlines

Each mark is a scheduled departure at its origin-local time, observed operating in the last 7 days. Today is highlighted.

Who flies it

observed on the boards · 7 days
Alaska AirlinesAS100% on time

Flights AS317 07:07 daily · AS682 12:00 daily · AS567 15:30 daily · AS615 17:57 daily

Delta Air LinesDL

Flights DL1731 06:00 daily · DL1358 13:55 daily · DL2543 18:42 daily

Frontier AirlinesF9

Flights F91175 13:07 daily

Southwest AirlinesWN80% on time

Flights WN3769 08:30 Su · WN4392 varies Mo Tu We Th Fr Sa · WN447 11:30 Mo Th Fr · WN3109 11:45 Su

United AirlinesUA80% on time

Flights UA2271 07:40 Mo Tu We Su · UA1348 08:02 daily · UA2058 11:22 daily · UA2302 11:50 Mo Tu We Su

History

operated legs · board outcomes
10-28AS317departed−7
10-28DL1731departed−11
10-28UA2271departed−7
10-28WN4392dep +3 → arr−11
10-27AS317departed−6
10-27AS567departed+4
10-27AS615departed−3
10-27AS682departed−8
10-27DL1358departed+10
10-27DL1731departed+4
10-27DL2543departed−10
10-27UA2013departed+7
10-27UA2271departed−4
10-27UA2302departed+5
10-27UA2767departed+19
10-27WN183departed+69
10-27WN4358departed+9
10-27WN4392departed+7
10-27WN4538departed+6

Actual board outcomes rather than schedules, paired departure and arrival per flight and day.

Full board history, day by day →

Airports right now

live boards
DENDenver +0 min smooth 🌤 mostly cloudy · SSE 6 kt Full DEN delay board →
SEASeattle +60 min disrupted 🌤 mostly cloudy · S 12 kt Full SEA delay board →

Weather lens

Current conditions put the pressure at DEN: 38% odds of a 15+ minute delay and around +9 min expected when it bites, measured from this route's own weather-matched delay history. See live delays → · Weather risk by airport →

How the Denver to Seattle route actually runs

Pro Flight Search records official board updates for nonstop DEN to SEA flights through the day: schedules, estimates, gate pushes and actual departures. The verdict above comes from operated flights, so it reflects what this route does rather than what the timetable promises.

Planning around a delay? Live airport delays · Weather delay risk map · Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure

Cite this data

Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.

Suggested citation

Pro Flight Search — Denver (DEN) to Seattle (SEA) route reliability, measured from operated flights on official airport boards.

Canonical URL
https://proflightsearch.com/search-flights/DEN-SEA
How we measure this →

DEN to SEA questions

Is DEN–SEA running on time right now?

Some delays possible. The arrival side at SEA is the weaker end, route health score 60/100. The airports section above carries the live status and delay window at both ends.

Morning or evening flight on DEN–SEA?

Operators schedule morning departures around 06:00 and evening departures around 17:05 from DEN. Earlier flights typically land before destination-airport delays accumulate later in the day; check the SEA delay card to confirm conditions when you'd arrive.

How long is the flight from DEN to SEA?

Great-circle distance is 1,645 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 146–171 min gate-to-gate on this route.

How often does DEN–SEA fly?

5 carriers operate this route, around 132 flights a week between them. Compare carrier days and times in the airline list above.