Need help booking?
Unpublished phone-only deals available
SEA to DEN: distance & flight time
Seattle (Seattle Tacoma International Airport) → Denver (Denver International Airport)
1,022 mi
1,645 km · 888 nm
2h 41m
estimated nonstop flight time
+1h
time difference · heading southeast
See live SEA→DEN fares Phone-only fares on this route — call free
Flight time details
1,022 miles nonstop takes roughly 2h 41m gate to gate, flying southeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 1-hour time gain when reading arrival times on your ticket.
The two airports
- SEA — Seattle Tacoma International Airport · Seattle, United States
- DEN — Denver International Airport · Denver, United States
Distances are great-circle ("as the crow flies") — the same basis airlines use for frequent-flyer miles.
Alternate airports can cut this fare
Flying from or into a nearby airport is the #1 trick our agents use to beat online prices. Call and we'll compare every combination on one call.
Near SEA
- RNT · Renton Municipal Airport5 mi away
- BFI · Boeing Field King County International Airport6 mi away
- TIW · Tacoma Narrows Airport18 mi away
- PWT · Bremerton National Airport21 mi away
Near DEN
- BFK · Buckley Air Force Base12 mi away
- APA · Centennial Airport22 mi away
- BJC · Rocky Mountain Metropolitan Airport24 mi away
- WBU · Boulder Municipal Airport32 mi away
Frequently asked questions
How far is SEA from DEN?
The flight distance from Seattle (SEA) to Denver (DEN) is 1,022 miles (1,645 km, 888 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from SEA to DEN?
A nonstop flight takes about 2h 41m gate to gate. Actual time varies with winds, routing and season — eastbound transatlantic flights, for example, are usually faster than the return.
What is the time difference between Seattle and Denver?
Denver is 1 hour ahead of Seattle.
What is the cheapest way to fly from SEA to DEN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on SEA–DEN that never appear on search engines, with no booking fees.