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 agoOctober 2026
Mon
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Fair Availability
38% of dates checked are available within 10% of the lowest price
Thursday, October 15th, 2026
Outbound Flights
5h 46m·Nonstop
$344 USD
IADOct 15 13:05
→SEAOct 15 15:51
UA 1824Boeing 737MAX 9 Passenger
5h 52m·Nonstop
$344 USDIADOct 15 17:45
→SEAOct 15 20:37
UA 1128Boeing 737MAX 9 Passenger
8h 47m·1 stop
$354 USDIADOct 15 08:30
→SFOOct 15 11:22
UA 1147Boeing 757
41m layover
SFOOct 15 12:03
→SEAOct 15 14:17
UA 2744Airbus A319
8h 17m·1 stop
$354 USDIADOct 15 06:10
→ORDOct 15 07:25
UA 2691Boeing 737MAX 9 Passenger
1h 20m layover
ORDOct 15 08:45
→SEAOct 15 11:27
UA 2099Airbus A321neo
8h 48m·1 stop
$354 USDIADOct 15 06:35
→SFOOct 15 09:23
UA 1095Boeing 757
45m layover
SFOOct 15 10:08
→SEAOct 15 12:23
UA 500Airbus A320
9h 22m·1 stop
$354 USDIADOct 15 09:28
→LAXOct 15 12:02
UA 657Boeing 737MAX 9 Passenger
53m layover
LAXOct 15 12:55
→SEAOct 15 15:50
UA 6043Embraer 175
8h 42m·1 stop
$354 USDIADOct 15 13:10
→ORDOct 15 14:26
UA 2331Boeing 737
1h 39m layover
ORDOct 15 16:05
→SEAOct 15 18:52
UA 1801Airbus A321neo
9h 38m·1 stop
$354 USDIADOct 15 18:37
→SFOOct 15 21:26
UA 2832Boeing 737MAX 9 Passenger
1h 19m layover
SFOOct 15 22:45
→SEAOct 16 01:15
UA 5579Embraer 175