$154 Cheap Delta flights Washington (IAD) to Seattle (SEA)

View $154 flight on Tue, Aug 5, 2025Opens in a new window

$154 Cheap Delta flights Washington (IAD) to Seattle (SEA)

Prices were available within the past 7 days and start at $154 for one-way flights and $277 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Tue, Aug 12 - Tue, Aug 19
IAD
Washington
SEA
Seattle
$277 Roundtrip, found 5 hours ago
$277
Roundtrip
found 5 hours ago
Select Delta flight, departing Tue, Aug 12 from Washington to Seattle, returning Tue, Aug 19, priced at $277 found 5 hours ago
Delta
Tue, Jul 29 - Tue, Aug 12
IAD
Washington
SEA
Seattle
$292 Roundtrip, found 1 day ago
$292
Roundtrip
found 1 day ago
Select Delta flight, departing Tue, Jul 29 from Washington to Seattle, returning Tue, Aug 12, priced at $292 found 1 day ago
Flights from Washington (IAD) to Seattle (SEA)
Origin airport
Washington Dulles Intl.
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Hawaiian Airlines, United
Popular airline
Alaska Airlines
Distance
3679 km
Average flight time
2 hours 48 mins