Cheap flights from Seattle to Boston
from 200 US$
From 309 USD — compare hundreds of airlines
The cheapest month is usually 2026-08 · 200 US$
See prices for my dates →Live fares from 100+ sites — free, with no hidden fees.
About this route
Compare flights from Seattle to Boston, a about 4,000 km route (around 5h 30m nonstop). We gather live prices from hundreds of airlines and agencies so you can find the cheapest and book on the official site, with no hidden fees. Direct flights are available. Airlines such as Alaska Airlines, jetBlue operate this route.
When to buy and when to fly
Prices by date
Fares found by date — cheapest days in green.
How to get the best price
Airlines on this route
FAQ
What's the cheapest month to fly Seattle to Boston?
It's usually 2026-08, from 200 USD. Use the price calendar to compare other dates.
How long is the flight from Seattle to Boston?
A nonstop flight takes about 5h 30m and covers around 4,000 km. Connecting itineraries take longer.
Are there direct flights from Seattle to Boston?
Yes, this route has nonstop flights. Filter by "nonstop" to see them.
Which airlines fly from Seattle to Boston?
Alaska Airlines, jetBlue operate this route, among others. Compare them all in the results.
When should I book Seattle–Boston flights?
As a rule of thumb, booking 3–8 weeks ahead and avoiding weekends and holidays tends to give the best prices. Use the calendar to spot the cheapest dates.
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