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BFI to SUS: distance & flight time
Seattle (Boeing Field King County International Airport) → Null (Spirit of St Louis Airport)
1,696 mi
2,729 km · 1,474 nm
3h 48m
estimated nonstop flight time
+2h
time difference · heading east
See live BFI→SUS fares Phone-only fares on this route — call free
Flight time details
1,696 miles nonstop takes roughly 3h 48m 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
- SUS — Spirit of St Louis Airport · Null, 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 SUS
- STL · St Louis Lambert International Airport16 mi away
- ALN · St Louis Regional Airport36 mi away
- BLV · Scott AFB/Midamerica Airport45 mi away
- JEF · Jefferson City Memorial Airport81 mi away
Frequently asked questions
How far is BFI from SUS?
The flight distance from Seattle (BFI) to Null (SUS) is 1,696 miles (2,729 km, 1,474 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from BFI to SUS?
A nonstop flight takes about 3h 48m 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 Null?
Null is 2 hours ahead of Seattle.
What is the cheapest way to fly from BFI to SUS?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on BFI–SUS that never appear on search engines, with no booking fees.