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BFI to STL: distance & flight time
Seattle (Boeing Field King County International Airport) → St. Louis (St Louis Lambert International Airport)
1,706 mi
2,745 km · 1,482 nm
3h 49m
estimated nonstop flight time
+2h
time difference · heading east
See live BFI→STL fares Phone-only fares on this route — call free
Flight time details
1,706 miles nonstop takes roughly 3h 49m gate to gate, flying east. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 2-hour time gain when reading arrival times on your ticket.
The two airports
- BFI — Boeing Field King County International Airport · Seattle, United States
- STL — St Louis Lambert International Airport · St. Louis, 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 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
Near STL
- SUS · Spirit of St Louis Airport16 mi away
- ALN · St Louis Regional Airport20 mi away
- BLV · Scott AFB/Midamerica Airport32 mi away
- SPI · Abraham Lincoln Capital Airport84 mi away
Frequently asked questions
How far is BFI from STL?
The flight distance from Seattle (BFI) to St. Louis (STL) is 1,706 miles (2,745 km, 1,482 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from BFI to STL?
A nonstop flight takes about 3h 49m 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 St. Louis?
St. Louis is 2 hours ahead of Seattle.
What is the cheapest way to fly from BFI to STL?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on BFI–STL that never appear on search engines, with no booking fees.