Flights from Seattle to Boston from $ 317*
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1 Passenger, Economy
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today
today
Featured daily fares for flights from Seattle (SEA) to Boston (BOS)
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Try alternate month or interact with individual days below in order to find offers.
More United deals on Seattle (SEA) to Boston (BOS) flights
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From | To | Fare Type | Dates | Price |
|---|---|---|---|---|
| Seattle (SEA) | Boston (BOS) | Roundtrip | Economy | 05/05/26 - 05/07/26 | from $ 347 Viewed: 1 day ago |
| Seattle (SEA) | Boston (BOS) | Roundtrip | Economy | 04/21/26 - 04/28/26 | from $ 317 Viewed: 15 hours ago |
| Seattle (SEA) | Boston (BOS) | Roundtrip | Economy | 05/01/26 - 05/05/26 | from $ 347 Viewed: 22 hours ago |
| Seattle (SEA) | Boston (BOS) | Roundtrip | Economy | 04/07/26 - 04/09/26 | from $ 477 Viewed: 20 hours ago |
| Seattle (SEA) | Boston (BOS) | Roundtrip | Economy | 05/29/26 - 05/31/26 | from $ 487 Viewed: 19 hours ago |
| Seattle (SEA) | Boston (BOS) | Roundtrip | Economy | 08/21/26 - 08/30/26 | from $ 550 Viewed: 15 hours ago |
| Seattle (SEA) | Boston (BOS) | Roundtrip | Economy | 06/19/26 - 06/30/26 | from $ 567 Viewed: 14 hours ago |
| Seattle (SEA) | Boston (BOS) | Roundtrip | Economy | 04/09/26 - 04/11/26 | from $ 607 Viewed: 7 hours ago |
*Prices have been available for round trips within the last 48 hours and may not be currently available. For Economy class, fares listed may be Basic Economy, which is our most restrictive fare option and subject to additional restrictions. Additional baggage charges and fees for other optional service may apply. Other terms and conditions may apply. Schedules are subject to change without notice.
