Washington (IAD) to Seattle / Tacoma (SEA) flight deal in economy from $209
IADWashington Dulles International Airport
Washington, United States
SEASeattle–Tacoma International Airport
Seattle / Tacoma, United States
$272 USD
-23%$209 USD
Verified 28 days agoDecember 2026
Mon
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Fair Availability
38% of dates checked are available within 10% of the lowest price
Tuesday, December 22nd, 2026
Outbound Flights
12h 27m·1 stop
$260 USD
IADDec 22 13:05
→ORDDec 22 14:29
UA 2331Boeing 737MAX 9 Passenger
5h 13m layover
ORDDec 22 19:42
→SEADec 22 22:32
UA 2798Airbus A321neo
9h 1m·1 stop
$294 USDIADDec 22 13:05
→ORDDec 22 14:29
UA 2331Boeing 737MAX 9 Passenger
1h 51m layover
ORDDec 22 16:20
→SEADec 22 19:06
UA 1801Airbus A321neo
8h 12m·1 stop
$294 USDIADDec 22 17:20
→ORDDec 22 18:50
UA 2497Boeing 737
52m layover
ORDDec 22 19:42
→SEADec 22 22:32
UA 2798Airbus A321neo
23h 21m·1 stop
$302 USDIADDec 22 22:45
→ORDDec 23 00:01
UA 421Boeing 737
16h 19m layover
ORDDec 23 16:20
→SEADec 23 19:06
UA 1801Airbus A321neo
9h 16m·1 stop
$315 USDIADDec 22 06:10
→ORDDec 22 07:32
UA 565Boeing 737MAX 9 Passenger
1h 57m layover
ORDDec 22 09:29
→SEADec 22 12:26
UA 2099Boeing 737
6h 7m·Nonstop
$322 USDIADDec 22 17:55
→SEADec 22 21:02
UA 1128Boeing 737MAX 9 Passenger
9h 9m·1 stop
$366 USDIADDec 22 10:10
→ORDDec 22 11:37
UA 1252Boeing 737
1h 58m layover
ORDDec 22 13:35
→SEADec 22 16:19
UA 1764Boeing 737
6h 7m·Nonstop
$385 USDIADDec 22 08:50
→SEADec 22 11:57
UA 2731Boeing 737