Need help booking?
Unpublished phone-only deals available
SEA to BOS: distance & flight time
Seattle (Seattle Tacoma International Airport) → Boston (General Edward Lawrence Logan International Airport)
2,489 mi
4,006 km · 2,163 nm
5h 21m
estimated nonstop flight time
+3h
time difference · heading east
See live SEA→BOS fares Phone-only fares on this route — call free
Flight time details
2,489 miles nonstop takes roughly 5h 21m gate to gate, flying east. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 3-hour time gain when reading arrival times on your ticket.
The two airports
- SEA — Seattle Tacoma International Airport · Seattle, United States
- BOS — General Edward Lawrence Logan International Airport · Boston, 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 SEA
- RNT · Renton Municipal Airport5 mi away
- BFI · Boeing Field King County International Airport6 mi away
- TIW · Tacoma Narrows Airport18 mi away
- PWT · Bremerton National Airport21 mi away
Near BOS
- OWD · Norwood Memorial Airport15 mi away
- BED · Laurence G Hanscom Field16 mi away
- BVY · Beverly Municipal Airport16 mi away
- LWM · Lawrence Municipal Airport25 mi away
Frequently asked questions
How far is SEA from BOS?
The flight distance from Seattle (SEA) to Boston (BOS) is 2,489 miles (4,006 km, 2,163 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from SEA to BOS?
A nonstop flight takes about 5h 21m 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 Boston?
Boston is 3 hours ahead of Seattle.
What is the cheapest way to fly from SEA to BOS?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on SEA–BOS that never appear on search engines, with no booking fees.