Beginning of main content
Trip Type
Flight 1
Flight 2
Flight 3
Flight 4
Flight 5

Search over 1,000,000 properties worldwide and 550 airlines worldwide.

Search over a million flights, hotels, packages, and more

No Expedia cancellation fee to change or cancel almost any hotel reservation.

Cheap SEA to BOS Flights

Prices found within past 7 days. Prices and availability subject to change. Additional terms may apply.

Seattle to Boston route information

Origin Airport Seattle - Tacoma Intl.
Destination Airport Logan Intl.
Airlines Serving Alaska Airlines, American Airlines, Delta, Frontier Airlines, JetBlue Airways, Spirit Airlines, Sun Country Airlines, United
Flight Price $228
Distance 2,487 mi

Providence

$283.18

Worcester

$277.69

Provincetown

$346.21

New Bedford

$718.19

Cheap SEA to BOS Flights

  • Question : Which airline has the least delays from Seattle to Boston?
    Answer : Booking with NetJets Aviation means you will arrive to Boston about the time you were supposed to. In fact, this timely airline has a 100% on-time average.
  • Question : How many flights are there per day from Seattle to Boston?
    Answer : The number of flight times varies by day of the week, but on average, SEA to BOS sees 11 different choices. You’ll have more options on this route than most others departing the United States.
  • Question : Can I change the date of my flight?
    Answer : Yes, you can adjust your departure date. If you wish to save a little cash in doing so, the cheapest day to fly in June is Tuesday. Flexibility is key when booking travel to help keep costs down.
  • Question : Do some days of the week have more flight times than others?
    Answer : With 13 total flight time options, Monday provides the most flexibility from SEA to BOS. However, with eight flight times, Tuesday doesn't offer quite as many options when finding that perfect departure time.
  • Question : What is the cheapest day to fly?
    Answer : The cheapest day to fly from Seattle to Boston is on Tuesday. If you would like to save some cash on your next flight look for flights on Tuesday.
  • Question : What is the cheapest airline flying from Seattle to Boston?
    Answer : Delta Air Lines strives to keep prices low for their passengers over the next three months. Bookings are being made at just $236 and, when compared to the pricier bookings of $1,105, it's a terrific bargain.
  • Question : How much is a plane ticket to Boston (BOS) from Seattle (SEA)?
    Answer : Cost can range from $236 to $1,105, prices for SEA to BOS change less than the majority of routes in the United States. Prices are usually less the further out you book.