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WBU to SEA: distance & flight time
Boulder (Boulder Municipal Airport) → Seattle (Seattle Tacoma International Airport)
991 mi
1,595 km · 861 nm
2h 37m
estimated nonstop flight time
-1h
time difference · heading northwest
See live WBU→SEA fares Phone-only fares on this route — call free
Flight time details
991 miles nonstop takes roughly 2h 37m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 1-hour time set-back when reading arrival times on your ticket.
The two airports
- WBU — Boulder Municipal Airport · Boulder, United States
- SEA — Seattle Tacoma International Airport · Seattle, 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 WBU
- DEN · Denver International Airport32 mi away
- BJC · Rocky Mountain Metropolitan Airport11 mi away
- FNL · Northern Colorado Regional Airport31 mi away
- BFK · Buckley Air Force Base34 mi away
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
Frequently asked questions
How far is WBU from SEA?
The flight distance from Boulder (WBU) to Seattle (SEA) is 991 miles (1,595 km, 861 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from WBU to SEA?
A nonstop flight takes about 2h 37m 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 Boulder and Seattle?
Seattle is 1 hour behind Boulder.
What is the cheapest way to fly from WBU to SEA?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on WBU–SEA that never appear on search engines, with no booking fees.