Need help booking?
Unpublished phone-only deals available
BFI to UTH: distance & flight time
Seattle (Boeing Field King County International Airport) → Udon Thani (Udon Thani Airport)
7,155 mi
11,516 km · 6,218 nm
14h 30m
estimated nonstop flight time
+14h
time difference · heading northwest
See live BFI→UTH fares Phone-only fares on this route — call free
Flight time details
7,155 miles nonstop takes roughly 14h 30m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 14-hour time gain when reading arrival times on your ticket.
The two airports
- BFI — Boeing Field King County International Airport · Seattle, United States
- UTH — Udon Thani Airport · Udon Thani, Thailand
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 UTH
- VTE · Wattay International Airport44 mi away
- KKC · Khon Kaen Airport64 mi away
- LOE · Loei Airport70 mi away
- SNO · Sakon Nakhon Airport89 mi away
Frequently asked questions
How far is BFI from UTH?
The flight distance from Seattle (BFI) to Udon Thani (UTH) is 7,155 miles (11,516 km, 6,218 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from BFI to UTH?
A nonstop flight takes about 14h 30m 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 Udon Thani?
Udon Thani is 14 hours ahead of Seattle.
What is the cheapest way to fly from BFI to UTH?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on BFI–UTH that never appear on search engines, with no booking fees.