Need help booking?
Unpublished phone-only deals available
DCM to BFI: distance & flight time
Castres (Castres-Mazamet Airport) → Seattle (Boeing Field King County International Airport)
5,298 mi
8,526 km · 4,604 nm
10h 51m
estimated nonstop flight time
-9h
time difference · heading northwest
See live DCM→BFI fares Phone-only fares on this route — call free
Flight time details
5,298 miles nonstop takes roughly 10h 51m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 9-hour time set-back when reading arrival times on your ticket.
The two airports
- DCM — Castres-Mazamet Airport · Castres, France
- 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 DCM
- CCF · Carcassonne Airport24 mi away
- LBI · Albi-Le Séquestre Airport26 mi away
- TLS · Toulouse-Blagnac Airport47 mi away
- XMW · Montauban Airport56 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 DCM from BFI?
The flight distance from Castres (DCM) to Seattle (BFI) is 5,298 miles (8,526 km, 4,604 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from DCM to BFI?
A nonstop flight takes about 10h 51m 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 Castres and Seattle?
Seattle is 9 hours behind Castres.
What is the cheapest way to fly from DCM to BFI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on DCM–BFI that never appear on search engines, with no booking fees.