DenverSeattleFlight TimeDEN–SEA
Denver (Denver International Airport) to Seattle (Seattle-Tacoma International Airport).
The flight from Denver (DEN) to Seattle (SEA) takes 2h 28m on average, covering about 1,153 miles. Across 8 flights we tracked, the fastest was 2h 21m and the slowest 2h 41m, with Alaska Airlines flying it most often.
Plan this routeAt a glance
| Avg flight time | Distance | Fastest tracked | Airlines |
|---|---|---|---|
| 2h 28m | 1,153 mi | 2h 21m | 3 |
Airlines on this route
Captured airlines for DEN to SEA
Our current provider sample includes 22-23/day from DEN to SEA across 6 captured airlines.
- First departure
- 06:00
- Last departure
- 22:20
- Cadence
- ~every 30 min
- Captured departures/day
- 42
| Airline | Captured daily freq. | Aircraft | Departures (local) |
|---|---|---|---|
| United Airlines | 6-7/day | Airbus A320 family, Boeing 737 · Seat map | 06:0007:40 |
Aircraft we tracked
Flying the other way?
SEA to DEN flight time (4 tracked flights) →Flight times usually differ by direction — jet-stream winds make eastbound crossings faster than westbound ones.
Methodology: figures are aggregated from 8 real flights on this route tracked between 2026-06-04 and 2026-06-18, sourced from live flight data. Updated daily as new flights are observed.
Route FAQ
How long is the flight from DEN to SEA?
The DEN to SEA flight takes 2h 28m on average based on 8 tracked flights.
How far is DEN from SEA?
DEN to SEA is about 1,153 miles by air.
Which airlines fly from DEN to SEA?
Alaska Airlines, Southwest Airlines, Delta Air Lines fly the DEN to SEA route in our tracked route data.
What aircraft fly from DEN to SEA?
Aircraft observed on DEN to SEA include Boeing 737 MAX 8, Airbus A220-300, Boeing 737-800.