DEN → SEADenver to Seattle

live

Direct flights from Denver (DEN) to Seattle (SEA): 35 nonstop departures observed each week across 5 airlines. 88% of the last 32 operated flights arrived within 15 minutes of schedule. The median arrival is on schedule. No cancellations were recorded across the 32 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 20 October 2026 at 01:55 UTC.

Today, DEN → SEA

Mon 19 Oct · local times
WN1769Southwest77 min late

The DEN board at 19:54 shows departure at 19:47 instead of 18:30, gate C48.

Landing
21:27SEA board estimate · sched 20:35
Later cancelled
1.3%of 10,994 past Southwest flights whose board showed 70 min or more late
Still to leave today
UA2651 20:58United
Track WN1769 →
  1. 06:00 DL1731Delta Air Lines Left 06:05 +5 ·
  2. 07:07 AS317Alaska Airlines Left 07:03 ·
  3. 08:02 UA1348United Airlines Left 07:56 ·
  4. 08:30 WN4392Southwest Airlines Left 08:33 ·
  5. 11:22 UA2058United Airlines Left 11:18 Landed 13:21
  6. 11:30 WN447Southwest Left 12:02 +32 Landed 13:30
  7. 12:00 AS682Alaska Airlines Left 11:57 Landed 13:59
  8. 13:07 F91175Frontier Airlines Est. 06:00Gate A79 ·
  9. 13:55 DL1358Delta Air Lines Left 14:09 +14 Landed 16:08
  10. 14:05 UA2833United Left 14:04 Landed 16:03
  11. 15:30 AS567Alaska Airlines Left 15:52 +22 Landed 17:29
  12. 15:40 UA2013United Airlines Left 15:39 Landed 17:37
  13. 17:57 AS615Alaska Airlines Left 17:59 SEA est. 19:45In the air · sched 19:58
  14. 18:30 WN1769Southwest Est. 19:47 +77Gate C48 SEA est. 21:27 +52sched 20:35
  15. 18:42 DL2543Delta Air Lines Left 18:35 SEA est. 20:23In the air · sched 20:48
  16. 19:14 UA2767United Airlines Left 19:18 SEA est. 21:04In the air · sched 21:15
  17. 20:58 UA2651United On scheduleGate A36 SEA est. 22:43sched 22:59
  18. · WN1048Southwest On schedule SEA est. 23:02 +27sched 22:35

Checked DEN board 19:54 · SEA board 18:55

DEN Denver smooth · +4
SEA Seattle smooth · +0
1,645 km · ~2h 37m est.
dep bank 06:00–22:3535x weekly
Runs reliable · 5 airlines · 35x weekly · nonstop
88% on time

of the last 32 operated DEN → SEA flights arrived within 15 minutes

Median arrival delay is −1 min. 0 of 32 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →

Median arrival−1 minacross the last 32 operated legs
Flight time~2h 37mestimated from route distance
Weekly departures35x5 direct airlines on the leg
Cancelled0.0%recent route rate · 0 of 32

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 AirlinesAS88% on time

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

Delta Air LinesDL100% on time

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

Frontier AirlinesF9

Flights F91175 13:07 daily

Southwest AirlinesWN50% 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 AirlinesUA100% on time

Flights UA1348 08:02 daily · UA2058 11:22 daily · UA2833 14:05 Mo Th Fr Su · UA2013 15:40 daily

History

operated legs · board outcomes
10-19AS317departed−4
10-19AS567departed+22
10-19AS615dep +2 → arr−13
10-19AS682departed−3
10-19DL1358departed+14
10-19DL1731departed+5
10-19DL2543dep −7 → arr−25
10-19UA1348departed−6
10-19UA2013departed−1
10-19UA2058departed−4
10-19UA2767dep +4 → arr−11
10-19UA2833departed−1
10-19WN4392departed+3
10-19WN447departed+32
10-18AS317departed−4
10-18AS567departed+13
10-18AS615departed+8
10-18AS682departed+5
10-18DL1358departed−2
10-18DL1731departed−8
10-18DL2543departed−1
10-18F91175departed−5
10-18UA1348departed−6
10-18UA2013departed−1
10-18UA2058departed−1
10-18UA2651departed−7
10-18UA2767departed−5
10-18UA2833departed−10
10-18WN3109departed+8
10-18WN3245departed+76
10-18WN3769departed+1
10-18WN4358departed+28

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 +4 min smooth 🌤 scattered clouds · ESE 6 kt Full DEN delay board →
SEASeattle +0 min smooth 🌤 scattered clouds · N 8 kt Full SEA delay board →

Weather lens

Current conditions put the pressure at DEN: 40% odds of a 15+ minute delay and around +11 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?

Smooth skies ahead. The departure side at DEN is the weaker end, route health score 96/100. 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 124 flights a week between them. Compare carrier days and times in the airline list above.