￥31,890 Cheap United flights Seattle (SEA) to Boston (BOS)

View ￥31,890 flight on Wed, Dec 31, 2025Opens in a new window
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￥31,890 Cheap United flights Seattle (SEA) to Boston (BOS)

Prices were available within the past 7 days and start at ￥31,890 for one-way flights and ￥63,310 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Tue, Jan 6 - Tue, Jan 13
SEA
Seattle
BOS
Boston
￥63,310 Roundtrip, found 5 days ago
￥63,310
Roundtrip
found 5 days ago
Select United flight, departing Tue, Jan 6 from Seattle to Boston, returning Tue, Jan 13, priced at ￥63,310 found 5 days ago
Flights from Seattle (SEA) to Boston (BOS)
Origin airport
Seattle - Tacoma Intl.
Destination airport
Logan Intl.
Airlines serving
American Airlines, Delta, United
Popular airline
American Airlines
Distance
3980 km
Average flight time
8 hours 53 mins

Frequently asked questions

How much is a United Airlines flight from Seattle - Tacoma Intl. Airport (SEA) to Logan Intl. Airport (BOS)?
You'll discover affordable round-trip United Airlines flights from ￥63,310 from SEA to BOS by filtering your results from "Price (lowest to highest)" on Expedia. Or search for deals from ￥31,890 for a one-way trip.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from SEA to BOS with United Airlines?
Search for one-way or return flights to Boston in January or February. You could find a cheap fare with United Airlines during these off-season months.
Does United Airlines fly nonstop from Seattle - Tacoma Intl. Airport (SEA) to Logan Intl. Airport (BOS)?
Select our "Nonstop" filter when looking for direct United Airlines flights from SEA to BOS. You can also compare other carriers offering the same direct route.
What airports does United Airlines fly into in Boston?
United Airlines flights from Seattle - Tacoma Intl. Airport (SEA) to Boston land at Logan Intl. Airport (BOS). This is the main gateway to this destination.
Can I change or cancel my United Airlines flight from Seattle - Tacoma Intl. Airport (SEA) to Logan Intl. Airport (BOS)?
It's generally possible to reschedule or cancel your flight, although there may be additional fees if your booking was made more than 24 hours ago. Need to keep your options open? Apply the "Changes included" and "No cancel fee" filters to find flights that won't penalize you if you have to adjust your plans. To make changes, go to "Trips," select your flight and click on "Manage Booking" for more information.
*Available to Expedia members.