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TTD to BFI: distance & flight time
Troutdale (Portland Troutdale Airport) → Seattle (Boeing Field King County International Airport)
137 mi
220 km · 119 nm
50m
estimated nonstop flight time
Same time
time difference · heading north
See live TTD→BFI fares Phone-only fares on this route — call free
Flight time details
137 miles nonstop takes roughly 50m gate to gate, flying north. Add 45–90 minutes per connection if there's no nonstop service. Both airports share the same local time, so schedules read exactly as flown.
The two airports
- TTD — Portland Troutdale Airport · Troutdale, United States
- BFI — Boeing Field King County 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 TTD
- PDX · Portland International Airport10 mi away
- HIO · Portland Hillsboro Airport27 mi away
- KLS · Southwest Washington Regional Airport46 mi away
- SLE · Salem Municipal Airport/McNary Field53 mi away
Near BFI
- SEA · Seattle Tacoma International Airport6 mi away
- RNT · Renton Municipal Airport5 mi away
- PWT · Bremerton National Airport22 mi away
- TIW · Tacoma Narrows Airport22 mi away
Frequently asked questions
How far is TTD from BFI?
The flight distance from Troutdale (TTD) to Seattle (BFI) is 137 miles (220 km, 119 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from TTD to BFI?
A nonstop flight takes about 50m gate to gate. Actual time varies with winds, routing and season — eastbound transatlantic flights, for example, are usually faster than the return.
Are there nonstop flights from TTD to BFI?
Nonstop service on TTD–BFI depends on the season and the day of week. Run the fare search on this page with the nonstop filter applied to see current direct options; when there is no nonstop, a single connection through a carrier hub adds roughly 2–4 hours to the 50m nonstop estimate.
What is the cheapest way to fly from TTD to BFI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on TTD–BFI that never appear on search engines, with no booking fees.
Why are some TTD to BFI fares phone-only?
Consolidator contracts let us sell certain TTD–BFI tickets below the price airlines permit us to publish online, so those fares can only be quoted over the phone. Call the travel desk and an agent will check phone-only inventory for your dates.