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PHL to BFI: distance & flight time
Philadelphia (Philadelphia International Airport) → Seattle (Boeing Field King County International Airport)
2,371 mi
3,816 km · 2,061 nm
5h 7m
estimated nonstop flight time
-3h
time difference · heading northwest
See live PHL→BFI fares Phone-only fares on this route — call free
Flight time details
2,371 miles nonstop takes roughly 5h 7m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 3-hour time set-back when reading arrival times on your ticket.
The two airports
- PHL — Philadelphia International Airport · Philadelphia, 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 PHL
- BBX · Wings Field18 mi away
- PNE · Northeast Philadelphia Airport19 mi away
- LLY · South Jersey Regional Airport22 mi away
- NXX · Willow Grove Naval Air Station/Joint Reserve Base23 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 PHL from BFI?
The flight distance from Philadelphia (PHL) to Seattle (BFI) is 2,371 miles (3,816 km, 2,061 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from PHL to BFI?
A nonstop flight takes about 5h 7m 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 Philadelphia and Seattle?
Seattle is 3 hours behind Philadelphia.
What is the cheapest way to fly from PHL to BFI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on PHL–BFI that never appear on search engines, with no booking fees.