Flights from Seattle to Boston
Nonstop flights from Seattle (SEA) to Boston (BOS) take about 5h 30m (4,006 km). Alaska Airlines and United Airlines fly it. Lowest fare seen: $164 one-way, nonstop (22 Oct 2026).
All flights from Seattle →All flights to Boston →
Photo of Boston: Phil Evenden on Pexels.
When you land in Boston
The airport transfer and the few things worth sorting before you fly.
Airport transfer
BOS → Boston, booked before you fly
A private driver meets you in arrivals at a price agreed when you book. Book with Welcome Pickups.
See transfer prices
Seattle Airport · 2 lounges
Find hotels in Boston
Hotels, hostels & more · Trip.com
Airlines flying Seattle to Boston
Carriers on SEA–BOS according to our route data and nonstop fares seen as of 22 Oct 2026. Not a complete list.
Seattle to Boston fares by month
Cheapest month seen for a nonstop flight: Oct 2026, from $164 one-way. Lowest one-way fares seen for departures in each month, read 22 Oct 2026.
| Departing | Nonstop from | Cheaper with stops |
|---|---|---|
| Oct 2026 | $16427 Oct 2026 · Alaska Airlines | — |
| Nov 2026 | $2464 Nov 2026 · United Airlines | $179 · 1 stop4 Nov 2026 · United Airlines |
| Apr 2027 | $23412 Apr 2027 · Alaska Airlines | $228 · 1 stop12 Apr 2027 · United Airlines |
When to go for the lowest fare
The next few weeks were the cheapest to fly: from $164 in October 2026, against $228 at best later on.
Nonstop or with a stop
A connection undercut nonstop in 2 of 2 months with both fares.
From Travelpayouts flight-search data, city to city (Seattle to Boston, any airport), USD, read 22 Oct 2026. These are fares that were on sale, not a guarantee of today's price; an airline is named only where we know it flies this route.
More for this trip
Frequently asked questions — Seattle to Boston flights
How long is the flight from Seattle to Boston?
How far is Seattle from Boston by air?
Which airlines fly from Seattle to Boston?
How much does a flight from Seattle to Boston cost?
What is the cheapest month to fly from Seattle to Boston?
Do I need a visa to travel from Seattle to Boston?
Sources: fares from Travelpayouts flight-search data, seen 22 Oct 2026; airlines from each carrier's published network and nonstop fares on sale; distance from OurAirports coordinates; flight time estimated from distance. Fares change daily.
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