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
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Fair Availability
38% of dates checked are available within 10% of the lowest price
Wednesday, December 2nd, 2026
Outbound Flights
6h 6m·Nonstop
$260 USD
IADDec 2 17:55
→SEADec 2 21:01
UA 1128Boeing 737MAX 9 Passenger
9h 8m·1 stop
$273 USDIADDec 2 10:10
→ORDDec 2 11:33
UA 635Boeing 737MAX 9 Passenger
1h 57m layover
ORDDec 2 13:30
→SEADec 2 16:18
UA 2844Airbus A321neo
10h 22m·1 stop
$308 USDIADDec 2 06:00
→IAHDec 2 08:36
UA 451Boeing 737MAX 9 Passenger
1h 44m layover
IAHDec 2 10:20
→SEADec 2 13:22
UA 1062Boeing 737MAX 8 Passenger
11h 8m·1 stop
$308 USDIADDec 2 06:15
→SFODec 2 09:22
UA 1095Boeing 737MAX 9 Passenger
2h 43m layover
SFODec 2 12:05
→SEADec 2 14:23
UA 1264Airbus A320
9h 56m·1 stop
$325 USDIADDec 2 06:05
→EWRDec 2 07:20
UA 1359Boeing 757
2h 20m layover
EWRDec 2 09:40
→SEADec 2 13:01
UA 1330Boeing 737MAX 8 Passenger
10h 37m·1 stop
$392 USDIADDec 2 08:35
→LAXDec 2 11:24
UA 1734Boeing 757
1h 41m layover
LAXDec 2 13:05
→SEADec 2 16:12
UA 6043Embraer 175
9h 8m·1 stop
$491 USDIADDec 2 08:15
→SFODec 2 11:20
UA 1147Boeing 757
45m layover
SFODec 2 12:05
→SEADec 2 14:23
UA 1264Airbus A320
9h 12m·1 stop
$491 USDIADDec 2 14:35
→SFODec 2 17:46
UA 2862Boeing 737MAX 9 Passenger
47m layover
SFODec 2 18:33
→SEADec 2 20:47
UA 1497Airbus A320