Need help booking?
Unpublished phone-only deals available
ONO to BFI: distance & flight time
Ontario (Ontario Municipal Airport) → Seattle (Boeing Field King County International Airport)
352 mi
566 km · 306 nm
1h 24m
estimated nonstop flight time
-1h
time difference · heading northwest
See live ONO→BFI fares Phone-only fares on this route — call free
Flight time details
352 miles nonstop takes roughly 1h 24m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 1-hour time set-back when reading arrival times on your ticket.
The two airports
- ONO — Ontario Municipal Airport · Ontario, 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 ONO
- BOI · Boise Air Terminal/Gowen Field50 mi away
- BKE · Baker City Municipal Airport69 mi away
- MYL · McCall Municipal Airport75 mi away
- MUO · Mountain Home Air Force Base88 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 ONO from BFI?
The flight distance from Ontario (ONO) to Seattle (BFI) is 352 miles (566 km, 306 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from ONO to BFI?
A nonstop flight takes about 1h 24m 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 Ontario and Seattle?
Seattle is 1 hour behind Ontario.
What is the cheapest way to fly from ONO to BFI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on ONO–BFI that never appear on search engines, with no booking fees.