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$148 Cheap Delta flights Washington (IAD) to Seattle (SEA)
$148 Cheap Delta flights Washington (IAD) to Seattle (SEA)
Prices were available within the past 7 days and start at $148 for one-way flights and $265 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Sun, Sep 20 - Sat, Sep 26
IAD
Washington
SEA
Seattle
$265 Roundtrip, found 2 days ago
$265
Roundtrip
found 2 days ago

Sat, Aug 22 - Thu, Aug 27
IAD
Washington
SEA
Seattle
$326 Roundtrip, found 2 days ago
$326
Roundtrip
found 2 days ago

Sun, Sep 20 - Sun, Sep 27
IAD
Washington
SEA
Seattle
$336 Roundtrip, found 2 days ago
$336
Roundtrip
found 2 days ago

Wed, Aug 19 - Sun, Aug 30
IAD
Washington
SEA
Seattle
$366 Roundtrip, found 2 days ago
$366
Roundtrip
found 2 days ago
Find the cheapest month to fly from Washington (IAD) to Seattle (SEA)
September is typically the cheapest month to fly
From $245 - $351 per traveler.
Travel information
Origin airport | Washington Dulles Intl. |
|---|---|
Destination airport | Seattle - Tacoma Intl. |
Airlines serving | Alaska Airlines, American Airlines, Delta, United |
Popular airline | Alaska Airlines |
Distance | 3679 km |
Average flight time | 3 hours 12 mins |
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Most Popular Delta Routes from Washington
Most Popular Delta Routes from Seattle
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Popular Domestic Routes in Seattle - Tacoma Intl.
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