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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Sun
Fair Availability
38% of dates checked are available within 10% of the lowest price
Sunday, December 27th, 2026
Outbound Flights
6h 7m·Nonstop
$419 USD
IADDec 27 08:50
→SEADec 27 11:57
UA 2731Boeing 737
6h 7m·Nonstop
$419 USDIADDec 27 17:55
→SEADec 27 21:02
UA 1128Boeing 737MAX 9 Passenger
9h 26m·2 stops
$555 USDIADDec 27 12:40
→CKBDec 27 13:45
UA 6071Canadair RJ 200
35m layover
CKBDec 27 14:20
→ORDDec 27 15:28
UA 6073Canadair RJ 200
52m layover
ORDDec 27 16:20
→SEADec 27 19:06
UA 1801Airbus A321neo
9h 9m·1 stop
$658 USDIADDec 27 10:10
→ORDDec 27 11:37
UA 1252Boeing 737
1h 58m layover
ORDDec 27 13:35
→SEADec 27 16:19
UA 1764Boeing 737
8h 51m·1 stop
$658 USDIADDec 27 06:05
→EWRDec 27 07:20
UA 1359Boeing 737MAX 9 Passenger
1h 15m layover
EWRDec 27 08:35
→SEADec 27 11:56
UA 1330Boeing 737
9h 1m·1 stop
$744 USDIADDec 27 13:05
→ORDDec 27 14:29
UA 2331Boeing 737MAX 9 Passenger
1h 51m layover
ORDDec 27 16:20
→SEADec 27 19:06
UA 1801Airbus A321neo
9h·1 stop
$862 USDIADDec 27 14:40
→SFODec 27 17:50
UA 2862Boeing 737MAX 9 Passenger
42m layover
SFODec 27 18:32
→SEADec 27 20:40
UA 2159Boeing 737
8h 54m·1 stop
$889 USDIADDec 27 12:35
→SFODec 27 15:42
UA 1434Boeing 737MAX 9 Passenger
35m layover
SFODec 27 16:17
→SEADec 27 18:29
UA 2279Airbus A320