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
Wednesday, December 23rd, 2026
Outbound Flights
10h 2m·1 stop
$294 USD
IADDec 23 15:30
→ORDDec 23 16:54
UA 1786Boeing 737
2h 48m layover
ORDDec 23 19:42
→SEADec 23 22:32
UA 2798Airbus A321neo
9h 16m·1 stop
$335 USDIADDec 23 06:10
→ORDDec 23 07:32
UA 565Boeing 737MAX 9 Passenger
1h 57m layover
ORDDec 23 09:29
→SEADec 23 12:26
UA 2099Boeing 737
11h 56m·1 stop
$335 USDIADDec 23 10:10
→ORDDec 23 11:37
UA 1252Boeing 737
4h 43m layover
ORDDec 23 16:20
→SEADec 23 19:06
UA 1801Airbus A321neo
11h 4m·1 stop
$369 USDIADDec 23 08:15
→ORDDec 23 09:40
UA 1775Airbus A321neo
3h 55m layover
ORDDec 23 13:35
→SEADec 23 16:19
UA 1764Boeing 737
8h 12m·1 stop
$385 USDIADDec 23 17:20
→ORDDec 23 18:50
UA 2497Boeing 737
52m layover
ORDDec 23 19:42
→SEADec 23 22:32
UA 2798Airbus A321neo
6h 7m·Nonstop
$429 USDIADDec 23 17:55
→SEADec 23 21:02
UA 1128Boeing 737MAX 9 Passenger
8h 51m·1 stop
$439 USDIADDec 23 06:05
→EWRDec 23 07:20
UA 1359Boeing 737MAX 9 Passenger
1h 15m layover
EWRDec 23 08:35
→SEADec 23 11:56
UA 1330Boeing 737
6h 7m·Nonstop
$604 USDIADDec 23 08:50
→SEADec 23 11:57
UA 2731Boeing 737