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Boston Seattle - Cheap flights

Special flight deals from Boston to Seattle

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Find the best time to book cheap flights to Seattle

Flexible on travel dates? Discover the cheapest month to fly to Seattle

  • Cheapest round-trip flight

    from 317 USD

  • Cheapest month to travel

    August

  • The cheapest day to fly

    Thursday

  • Lowest prices

    30 days before
Jul
377 USD
Aug
317 USD
Sep
322 USD
Oct
346 USD
Nov
??
Dec
709 USD
Jan
??
Feb
397 USD
Mar
??
Apr
??
May
??
Jun
??

When is the best time to buy flight tickets?

Find out how far in advance it's worth booking round-trip flights.

  • 6 months before

    from

    753 USD

  • 3 months before

    from

    492 USD

  • 30 days before

    from

    405 USD

  • 7 days before

    from

    409 USD

  • 1 day before

    from

    667 USD

Discover the cheapest day to fly

Discover on which day of the week flights are usually the most affordable.
465 USD
Mon
451 USD
Tue
459 USD
Wed
382 USD
Thu
433 USD
Fri
462 USD
Sat
632 USD
Sun

General information

  • Local time (UTC-8)

  • Local currency

    USD
Seattle
Seattle, the largest city in the state of Washington, is situated between Puget Sound and Lake Washington, about 175 km from the Canadian border. Home to about 684,451 people in 2015, it is known as the "Emerald City" and serves as an important seaport and air gateway for trade with Asia. Seattle attracts visitors with the Space Needle, Pike Place Market, and the Museum of Pop Culture. The climate is temperate, with mild winters and cool summers. The best time to visit is summer, when temperatures are pleasant.