Need help booking?
Unpublished phone-only deals available
OSH to BFI: distance & flight time
Oshkosh (Wittman Regional Airport) → Seattle (Boeing Field King County International Airport)
1,632 mi
2,626 km · 1,418 nm
3h 40m
estimated nonstop flight time
-2h
time difference · heading west
See live OSH→BFI fares Phone-only fares on this route — call free
Flight time details
1,632 miles nonstop takes roughly 3h 40m gate to gate, flying west. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 2-hour time set-back when reading arrival times on your ticket.
The two airports
- OSH — Wittman Regional Airport · Oshkosh, 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 OSH
- FLD · Fond du Lac County Airport15 mi away
- ATW · Appleton International Airport19 mi away
- SBM · Sheboygan County Memorial Airport38 mi away
- GRB · Austin Straubel International Airport41 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 OSH from BFI?
The flight distance from Oshkosh (OSH) to Seattle (BFI) is 1,632 miles (2,626 km, 1,418 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from OSH to BFI?
A nonstop flight takes about 3h 40m 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 Oshkosh and Seattle?
Seattle is 2 hours behind Oshkosh.
What is the cheapest way to fly from OSH to BFI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on OSH–BFI that never appear on search engines, with no booking fees.