
$399 Cheap Delta flights Washington (IAD) to Seattle (SEA)
Prices were available within the past 7 days and start at $399 for one-way flights and $327 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Sat, May 9 - Mon, May 11
IAD
Washington
SEA
Seattle
$327 Roundtrip, found 1 day ago
$327
Roundtrip
found 1 day ago

Mon, May 4 - Thu, May 14
IAD
Washington
SEA
Seattle
$392 Roundtrip, found 1 day ago
$392
Roundtrip
found 1 day ago

Fri, Dec 26 - Fri, Jan 2
IAD
Washington
SEA
Seattle
$858 Roundtrip, found 23 hours ago
$858
Roundtrip
found 23 hours ago

Fri, Dec 26 - Fri, Jan 2
IAD
Washington
SEA
Seattle
$927 Roundtrip, found 23 hours ago
$927
Roundtrip
found 23 hours ago
Find the cheapest month to fly from Washington (IAD) to Seattle (SEA)
February is typically the cheapest month to fly
From $159 - $291 per traveler.
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 | 2 hours 59 mins |
Most Popular Delta Routes from Washington
Most Popular Delta Routes from Seattle
- Hartford to Orlando (BDL - MCO)
- Denver to Jacksonville (DEN - JAX)
- Minneapolis to Tampa (MSP - TPA)
- San Francisco to San Pedro Sula (SFO - SAP)
- Chicago to Rome (ORD - FCO)
- San Francisco to Puerto Vallarta (SFO - PVR)
- San Francisco to San Pedro Sula (SFO - SAP)
- Chicago to Rome (ORD - FCO)
- Billings to Harlingen (BIL - HRL)
- Los Angeles to Phoenix (LAX - PHX)
Popular Domestic Routes in Seattle - Tacoma Intl.
- Denver to Jacksonville (DEN - JAX)
- Newark Liberty Intl. Airport to Denver (EWR - DEN)
- New York to Phoenix (JFK - PHX)
- Minneapolis to Tampa (MSP - TPA)
- Hartford to Orlando (BDL - MCO)
- Newark Liberty Intl. Airport to Orlando (EWR - MCO)
- Los Angeles to McAllen (LAX - MFE)
- Seattle to Tel Aviv (SEA - TLV)
- San Francisco to San Pedro Sula (SFO - SAP)
- Newark Liberty Intl. Airport to Denver (EWR - DEN)