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Cheap flights from Boston to Seattle

Fares from $157 in December 2026. Compare every month below, then book with the site you like.

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Cheapest Boston to Seattle fares by month

Lowest price per person found in recent searches. Prices change often and are checked when you book.

Boston to Seattle at a glance

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Frequently asked questions

How much is a flight from Boston to Seattle?
The cheapest fare we found recently is $157 per person, departing Dec 13 on Southwest. Prices change daily, so search your dates to see today's fares.
What is the cheapest month to fly from Boston to Seattle?
December 2026 is currently the cheapest month, from $157. November 2026 is the most expensive, from $166.
Are there direct flights from Boston to Seattle?
Yes. Recent searches found nonstop fares from $166.
Which airlines fly from Boston to Seattle?
The cheapest recent fares on this route were on Alaska Airlines, Southwest.
How long is the flight from Boston to Seattle?
Boston and Seattle are about 2,489 miles apart, so a nonstop flight takes roughly 5h 45m. Flights with a stop take longer, depending on the connection.
How do I find the cheapest flight from Boston to Seattle?
Search your dates on Gotoesy. We list fares from several booking sites sorted cheapest first, show nearby dates when your day has no saved fare, and send you straight to the seller to book.

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