Book United Boston to Seattle flight deals from $256

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Search flights from Boston to Seattle (BOS - SEA)

July

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Tuesday 3rd

Return Wednesday 18th
from$ 428*Viewed: 1 hour ago

Wednesday 4th

Return Thursday 19th
from$ 389*Viewed: 1 hour ago

Friday 6th

Return Saturday 21st
from$ 442*Viewed: 1 hour ago

August

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Monday 27th

Return Tuesday 11th
from$ 285*Viewed: 1 hour ago

Tuesday 28th

Return Wednesday 12th
from$ 260*Viewed: 1 hour ago

Wednesday 29th

Return Thursday 13th
from$ 324*Viewed: 1 hour ago

September

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Wednesday 5th

Return Thursday 20th
from$ 260*Viewed: 1 hour ago

Sunday 9th

Return Monday 24th
from$ 260*Viewed: 1 hour ago

Tuesday 11th

Return Wednesday 26th
from$ 256*Viewed: 1 hour ago
**Prices have been available for round trips within the last 48 hours and may not be currently available. 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..
Downtown Seattle at sunset

Plan ahead for flights from Boston to Seattle

from
to
Type
Dates
Price*
Boston (BOS)
to Seattle (SEA)
Roundtrip
Depart Tue 11 Sep 2018
Return Wed 26 Sep 2018
from$ 256*Viewed: 1 hour ago
Boston (BOS)
to Seattle (SEA)
Roundtrip
Depart Tue 28 Aug 2018
Return Wed 12 Sep 2018
from$ 260*Viewed: 1 hour ago
Boston (BOS)
to Seattle (SEA)
Roundtrip
Depart Wed 5 Sep 2018
Return Thu 20 Sep 2018
from$ 260*Viewed: 1 hour ago
Boston (BOS)
to Seattle (SEA)
Roundtrip
Depart Sun 9 Sep 2018
Return Mon 24 Sep 2018
from$ 260*Viewed: 1 hour ago
Boston (BOS)
to Seattle (SEA)
Roundtrip
Depart Wed 3 Oct 2018
Return Thu 11 Oct 2018
from$ 260*Viewed: 1 day ago
Boston (BOS)
to Seattle (SEA)
Roundtrip
Depart Sun 2 Sep 2018
Return Mon 17 Sep 2018
from$ 281*Viewed: 1 hour ago
Boston (BOS)
to Seattle (SEA)
Roundtrip
Depart Wed 12 Sep 2018
Return Thu 27 Sep 2018
from$ 281*Viewed: 1 hour ago
Boston (BOS)
to Seattle (SEA)
Roundtrip
Depart Mon 27 Aug 2018
Return Tue 11 Sep 2018
from$ 285*Viewed: 1 hour ago
Boston (BOS)
to Seattle (SEA)
Roundtrip
Depart Mon 10 Sep 2018
Return Tue 25 Sep 2018
from$ 285*Viewed: 1 hour ago
Boston (BOS)
to Seattle (SEA)
Roundtrip
Depart Sun 16 Sep 2018
Return Mon 1 Oct 2018
from$ 285*Viewed: 1 hour ago
*Prices have been available for round trips within the last 48 hours and may not be currently available. 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.

Weather in Seattle

74 °FTuesday06/19/2018
83 °FWednesday06/20/2018
73 °FThursday06/21/2018
63 °FFriday06/22/2018
61 °FSaturday06/23/2018
68 °FSunday06/24/2018
64 °FMonday06/25/2018
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