Photo by Port of Seattle

Cheap Frontier Airlines flights Washington (IAD) to Seattle (SEA)
Cheap Frontier Airlines flights Washington (IAD) to Seattle (SEA)
Prices were available within the past 7 days and start at for one-way flights and $347 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Mon, Aug 17 - Thu, Aug 20
IAD
Washington
SEA
Seattle
$347 Roundtrip, found 1 day ago
$347
Roundtrip
found 1 day ago

Fri, Aug 14 - Thu, Aug 20
IAD
Washington
SEA
Seattle
$372 Roundtrip, found 1 day ago
$372
Roundtrip
found 1 day ago

Sun, Aug 16 - Thu, Aug 20
IAD
Washington
SEA
Seattle
$398 Roundtrip, found 1 day ago
$398
Roundtrip
found 1 day ago

Sun, Jun 28 - Fri, Jul 3
IAD
Washington
SEA
Seattle
$400 Roundtrip, found 1 day ago
$400
Roundtrip
found 1 day ago
Find the cheapest month to fly from Washington (IAD) to Seattle (SEA)
July is typically the cheapest month to fly
From $230 - $409 per traveler.
Travel information
Origin airport | Washington Dulles Intl. |
|---|---|
Destination airport | Seattle - Tacoma Intl. |
Airlines serving | Alaska Airlines, American Airlines, Delta, Frontier Airlines, United |
Popular airline | Delta |
Distance | 3679 km |
Average flight time | 3 hours 47 mins |
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Most Popular Frontier Airlines Routes from Washington
Most Popular Frontier Airlines Routes from Seattle
- Atlanta to Cincinnati (ATL - CVG)
- Newark Liberty Intl. Airport to Orlando (EWR - MCO)
- Washington to San Francisco (DCA - SFO)
- Phoenix to Chicago (PHX - ORD)
- Newark Liberty Intl. Airport to Atlanta (EWR - ATL)
- Milwaukee to Orlando (MKE - MCO)
- Houston to Atlanta (IAH - ATL)
- Trenton to Orlando (TTN - MCO)
- Buffalo to San Juan (BUF - SJU)
- Phoenix to Washington (PHX - DCA)
Popular Domestic Routes in Seattle - Tacoma Intl.
- Baltimore to San Francisco (BWI - SFO)
- Phoenix to Chicago (PHX - ORD)
- Orlando to Trenton (MCO - TTN)
- New York to Orlando (LGA - MCO)
- Houston to Atlanta (IAH - ATL)
- Newark Liberty Intl. Airport to Atlanta (EWR - ATL)
- Trenton to Orlando (TTN - MCO)
- Baltimore to San Francisco (BWI - SFO)
- Newark Liberty Intl. Airport to Tampa (EWR - TPA)
- Newark Liberty Intl. Airport to Orlando (EWR - MCO)