Flights to Cambridge from Seattle from RM713

View RM713 flight on Sat, 6 Sep 2025Opens in a new window

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Cheap Flights from Seattle to Cambridge (SEA-BOS)

Prices were available within the past 7 days and start at RM713 for one-way flights and RM1,681 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Wed, 16 Jul - Sun, 20 Jul
SEA
Seattle
BOS
Boston
RM1,681 Return, found 17 hours ago
RM1,681
Return
found 17 hours ago
Select Delta flight, departing Wed, 16 Jul from Seattle to Boston, returning Sun, 20 Jul, priced at RM1,681 found 17 hours ago
Delta
Wed, 16 Jul - Sun, 20 Jul
SEA
Seattle
BOS
Boston
RM1,850 Return, found 17 hours ago
RM1,850
Return
found 17 hours ago
Select Delta flight, departing Wed, 16 Jul from Seattle to Boston, returning Sun, 20 Jul, priced at RM1,850 found 17 hours ago
United
Wed, 16 Jul - Sun, 20 Jul
SEA
Seattle
BOS
Boston
RM1,933 Return, found 17 hours ago
RM1,933
Return
found 17 hours ago
Select United flight, departing Wed, 16 Jul from Seattle to Boston, returning Sun, 20 Jul, priced at RM1,933 found 17 hours ago
United
Wed, 16 Jul - Sun, 20 Jul
SEA
Seattle
BOS
Boston
RM1,955 Return, found 17 hours ago
RM1,955
Return
found 17 hours ago
Select United flight, departing Wed, 16 Jul from Seattle to Boston, returning Sun, 20 Jul, priced at RM1,955 found 17 hours ago
American Airlines
Wed, 16 Jul - Sun, 20 Jul
SEA
Seattle
BOS
Boston
RM1,976 Return, found 17 hours ago
RM1,976
Return
found 17 hours ago
Select American Airlines flight, departing Wed, 16 Jul from Seattle to Boston, returning Sun, 20 Jul, priced at RM1,976 found 17 hours ago
Delta
Wed, 16 Jul - Sun, 20 Jul
SEA
Seattle
BOS
Boston
RM2,019 Return, found 17 hours ago
RM2,019
Return
found 17 hours ago
Select Delta flight, departing Wed, 16 Jul from Seattle to Boston, returning Sun, 20 Jul, priced at RM2,019 found 17 hours ago

Find the cheapest month to fly from Seattle (SEA) to Boston (BOS)

March is typically the cheapest month to fly

From RM 663 - RM 1,302 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.