Denver to Seattle flights
Direct and connecting flights from Denver International Airport (DEN) to Seattle Tacoma International Airport (SEA) — airlines, aircraft types, and the safety record for this route.
Route FAQ
How long does the flight from Denver to Seattle take?
Flight time from Denver (DEN) to Seattle (SEA) depends on routing, aircraft type, and whether the flight is direct or connecting. A direct flight typically reflects great-circle distance plus winds, while one-stop options can add several hours depending on the layover airport. The typical block time and frequency we have observed for this route are shown above.
Which airlines fly from Denver to Seattle?
Airline availability for DEN to SEA changes by season and sometimes week to week as carriers adjust capacity. The airlines and aircraft types observed operating this route, both direct and connecting, are listed below based on real flight-tracking data.
Are there direct flights from Denver to Seattle?
Direct (nonstop) availability on DEN to SEA varies by date, day of week, and season. Busy city pairs usually have multiple daily nonstops, while thinner routes may only have direct service a few days per week or only during peak seasons.
No fatal or serious occurrence involving any operator on this pair in the last 90 days.
- Alaska Airlines46
- United Airlines40
- Southwest Airlines40
- Delta Air Lines40
| Carrier | Sightings / 90d | Safety events |
|---|---|---|
| United Airlines | 7 sightings | No recorded events |
| Southwest Airlines | 3 sightings | No recorded events |
| Delta Air Lines | 2 sightings | No recorded events |
| Alaska Airlines | 2 sightings | No recorded events |
Planning DEN → SEA
DEN to SEA is a medium-haul route of 1,645 km (1,022 mi). See the return SEA → DEN route.
Alternative airports near Denver: Buckley (BFK) — 19 km, Denver (APA) — 36 km, Broomfield-CO (BJC) — 38 km.
Alternative airports near Seattle: Seattle (BFI) — 9 km, Renton (RNT) — 9 km, Tacoma (TIW) — 28 km.