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
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Fair Availability
38% of dates checked are available within 10% of the lowest price
Thursday, October 8th, 2026
Outbound Flights
5h 46m·Nonstop
$464 USD
IADOct 8 13:05
→SEAOct 8 15:51
UA 1824Boeing 737MAX 9 Passenger
5h 52m·Nonstop
$464 USDIADOct 8 17:45
→SEAOct 8 20:37
UA 1128Boeing 737MAX 9 Passenger
9h 22m·1 stop
$474 USDIADOct 8 09:28
→LAXOct 8 12:02
UA 657Boeing 737MAX 9 Passenger
53m layover
LAXOct 8 12:55
→SEAOct 8 15:50
UA 6043Embraer 175
8h 17m·1 stop
$493 USDIADOct 8 06:10
→ORDOct 8 07:25
UA 2691Boeing 737MAX 9 Passenger
1h 20m layover
ORDOct 8 08:45
→SEAOct 8 11:27
UA 2099Airbus A321neo
8h 42m·1 stop
$584 USDIADOct 8 13:10
→ORDOct 8 14:26
UA 2331Boeing 737
1h 39m layover
ORDOct 8 16:05
→SEAOct 8 18:52
UA 1801Airbus A321neo
10h 27m·1 stop
$584 USDIADOct 8 17:48
→SFOOct 8 20:30
UA 1757Boeing 787
2h 15m layover
SFOOct 8 22:45
→SEAOct 9 01:15
UA 5579Embraer 175
9h 38m·1 stop
$604 USDIADOct 8 18:37
→SFOOct 8 21:26
UA 2832Boeing 737MAX 9 Passenger
1h 19m layover
SFOOct 8 22:45
→SEAOct 9 01:15
UA 5579Embraer 175
8h 47m·1 stop
$695 USDIADOct 8 08:30
→SFOOct 8 11:22
UA 1147Boeing 737MAX 9 Passenger
41m layover
SFOOct 8 12:03
→SEAOct 8 14:17
UA 2744Airbus A319