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
Friday, December 11th, 2026
Outbound Flights
6h 6m·Nonstop
$229 USD
IADDec 11 17:55
→SEADec 11 21:01
UA 1128Boeing 737MAX 9 Passenger
9h 8m·1 stop
$239 USDIADDec 11 10:10
→ORDDec 11 11:33
UA 635Boeing 737
1h 57m layover
ORDDec 11 13:30
→SEADec 11 16:18
UA 2844Airbus A321neo
8h 46m·1 stop
$239 USDIADDec 11 13:00
→ORDDec 11 14:23
UA 2331Boeing 737MAX 8 Passenger
1h 37m layover
ORDDec 11 16:00
→SEADec 11 18:46
UA 2428Boeing 737MAX 9 Passenger
9h 5m·1 stop
$239 USDIADDec 11 06:15
→SFODec 11 09:22
UA 1095Boeing 737MAX 9 Passenger
43m layover
SFODec 11 10:05
→SEADec 11 12:20
UA 2192Airbus A320
10h 37m·1 stop
$239 USDIADDec 11 08:35
→LAXDec 11 11:24
UA 1734Boeing 757
1h 41m layover
LAXDec 11 13:05
→SEADec 11 16:12
UA 6043Embraer 175
9h 12m·1 stop
$270 USDIADDec 11 14:35
→SFODec 11 17:46
UA 2862Boeing 737MAX 9 Passenger
47m layover
SFODec 11 18:33
→SEADec 11 20:47
UA 1497Airbus A320
9h 8m·1 stop
$317 USDIADDec 11 08:15
→SFODec 11 11:20
UA 1147Boeing 757
45m layover
SFODec 11 12:05
→SEADec 11 14:23
UA 1264Airbus A320
8h 49m·1 stop
$325 USDIADDec 11 12:35
→DENDec 11 14:44
UA 561Airbus A321neo
1h 36m layover
DENDec 11 16:20
→SEADec 11 18:24
UA 2013Boeing 737