
Popular airlines from Boston to Dupont
- JetBlue Airways
JetBlue Airways
- Alaska Airlines
Alaska Airlines
- Sun Country Airlines
Sun Country Airlines
- United
United
- Delta
Delta
- American Airlines
American Airlines
- Southwest Airlines
Southwest Airlines
- Plan, book, fly with confidence
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Cheap Flights from Boston to Dupont (BOS-SEA)
Prices were available within the past 7 days and start at $72 for one-way flights and $144 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Sep 23 - Sat, Sep 27
BOS
Boston
SEA
Seattle
$144 Roundtrip, just found
$144
Roundtrip
just found

Wed, Sep 10 - Tue, Sep 16
PVD
Providence
SEA
Seattle
$183 Roundtrip, found 1 hour ago
$183
Roundtrip
found 1 hour ago

Tue, Aug 26 - Sat, Aug 30
MHT
Manchester
SEA
Seattle
$197 Roundtrip, found 2 days ago
$197
Roundtrip
found 2 days ago

Sat, Oct 4 - Sat, Oct 4
BOS
Boston
SEA
Seattle
$210 Roundtrip, found 3 days ago
$210
Roundtrip
found 3 days ago

Tue, Sep 16 - Tue, Sep 30
ORH
Worcester
SEA
Seattle
$267 Roundtrip, found 2 days ago
$267
Roundtrip
found 2 days ago

Tue, Sep 9 - Tue, Sep 23
BOS
Boston
PAE
Seattle
$362 Roundtrip, found 4 days ago
$362
Roundtrip
found 4 days ago
Find the cheapest month to fly from Boston (BOS) to Seattle (SEA)
September is typically the cheapest month to fly
From $155 - $245 per traveler.
Graph displaying average flight prices per month
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- The Home Course
- Fort Lewis Museum
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- Joint Base Lewis-McChord
- Billy Frank Jr. Nisqually National Wildlife Area
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