Flights to Merrimack Valley from Seattle - ￥15,910

View ￥15,910 flight on Wed, Nov 12, 2025Opens in a new window

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Cheap Flights from Seattle to Merrimack Valley (SEA-BOS)

Prices were available within the past 7 days and start at ￥15,910 for one-way flights and ￥33,750 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Wed, Oct 8 - Sat, Oct 11
SEA
Seattle
BOS
Boston
￥33,750 Roundtrip, found 1 day ago
￥33,750
Roundtrip
found 1 day ago
Select Delta flight, departing Wed, Oct 8 from Seattle to Boston, returning Sat, Oct 11, priced at ￥33,750 found 1 day ago
American Airlines
Thu, Sep 4 - Wed, Sep 10
SEA
Seattle
BOS
Boston
￥34,750 Roundtrip, found 4 days ago
￥34,750
Roundtrip
found 4 days ago
Select American Airlines flight, departing Thu, Sep 4 from Seattle to Boston, returning Wed, Sep 10, priced at ￥34,750 found 4 days ago
American Airlines
Tue, Oct 7 - Sat, Oct 11
SEA
Seattle
BOS
Boston
￥35,090 Roundtrip, found 1 day ago
￥35,090
Roundtrip
found 1 day ago
Select American Airlines flight, departing Tue, Oct 7 from Seattle to Boston, returning Sat, Oct 11, priced at ￥35,090 found 1 day ago
American Airlines
Thu, Sep 4 - Wed, Sep 10
SEA
Seattle
BOS
Boston
￥35,520 Roundtrip, found 4 days ago
￥35,520
Roundtrip
found 4 days ago
Select American Airlines flight, departing Thu, Sep 4 from Seattle to Boston, returning Wed, Sep 10, priced at ￥35,520 found 4 days ago
American Airlines
Thu, Sep 4 - Wed, Sep 10
SEA
Seattle
BOS
Boston
￥36,170 Roundtrip, found 4 days ago
￥36,170
Roundtrip
found 4 days ago
Select American Airlines flight, departing Thu, Sep 4 from Seattle to Boston, returning Wed, Sep 10, priced at ￥36,170 found 4 days ago
United
Tue, Oct 7 - Sat, Oct 11
SEA
Seattle
BOS
Boston
￥42,620 Roundtrip, found 1 day ago
￥42,620
Roundtrip
found 1 day ago
Select United flight, departing Tue, Oct 7 from Seattle to Boston, returning Sat, Oct 11, priced at ￥42,620 found 1 day ago

Find the cheapest month to fly from Seattle (SEA) to Manchester (MHT)

August is typically the cheapest month to fly

From ￥44,128 - ￥131,322 per traveler.

Graph displaying average flight prices per month

*Available to Expedia members.