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
Thursday, December 3rd, 2026
Outbound Flights
9h 8m·1 stop
$239 USD
IADDec 3 10:10
→ORDDec 3 11:33
UA 635Boeing 737
1h 57m layover
ORDDec 3 13:30
→SEADec 3 16:18
UA 2844Airbus A321neo
9h 4m·1 stop
$239 USDIADDec 3 17:40
→SFODec 3 20:39
UA 1757Boeing 787
51m layover
SFODec 3 21:30
→SEADec 3 23:44
UA 1007Boeing 737MAX 9 Passenger
9h 5m·1 stop
$239 USDIADDec 3 06:15
→SFODec 3 09:22
UA 1095Boeing 737MAX 9 Passenger
43m layover
SFODec 3 10:05
→SEADec 3 12:20
UA 2192Airbus A320
9h 8m·1 stop
$239 USDIADDec 3 08:15
→SFODec 3 11:20
UA 1147Boeing 757
45m layover
SFODec 3 12:05
→SEADec 3 14:23
UA 1264Airbus A320
11h 27m·1 stop
$239 USDIADDec 3 14:24
→IAHDec 3 17:01
UA 1381Boeing 737
2h 54m layover
IAHDec 3 19:55
→SEADec 3 22:51
UA 2341Boeing 737
6h 6m·Nonstop
$241 USDIADDec 3 17:55
→SEADec 3 21:01
UA 1128Boeing 737MAX 9 Passenger
10h 37m·1 stop
$251 USDIADDec 3 08:35
→LAXDec 3 11:24
UA 1734Boeing 757
1h 41m layover
LAXDec 3 13:05
→SEADec 3 16:12
UA 6043Embraer 175
9h 37m·1 stop
$296 USDIADDec 3 12:55
→IAHDec 3 15:32
UA 1535Boeing 737
1h 3m layover
IAHDec 3 16:35
→SEADec 3 19:32
UA 1951Boeing 737MAX 9 Passenger