Cheap flights from Boston to Seattle
From 161 USD — compare hundreds of airlines
About this route
Compare flights from Boston to Seattle, 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.
Prices by date
Airlines on this route
FAQ
What's the cheapest month to fly Boston to Seattle?
It's usually 2026-08, from 188 USD. Use the price calendar to compare other dates.
How long is the flight from Boston to Seattle?
A nonstop flight takes about 5h 30m and covers around 4,000 km. Connecting itineraries take longer.
Are there direct flights from Boston to Seattle?
Yes, this route has nonstop flights. Filter by "nonstop" to see them.
Which airlines fly from Boston to Seattle?
Alaska Airlines, jetBlue operate this route, among others. Compare them all in the results.
When should I book Boston–Seattle 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.