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
Tuesday, October 20th, 2026
Outbound Flights
15h 44m·1 stop
$460 USD
IADOct 20 22:10
→LGAOct 20 23:30
UA 4026Embraer 175
8h 20m layover·Overnight
EWROct 21 07:50
→SEAOct 21 10:54
UA 1330Boeing 737MAX 9 Passenger
5h 46m·Nonstop
$464 USDIADOct 20 13:05
→SEAOct 20 15:51
UA 1824Boeing 737MAX 9 Passenger
5h 52m·Nonstop
$464 USDIADOct 20 17:45
→SEAOct 20 20:37
UA 1128Boeing 737MAX 9 Passenger
8h 42m·1 stop
$474 USDIADOct 20 13:10
→ORDOct 20 14:26
UA 2331Boeing 737
1h 39m layover
ORDOct 20 16:05
→SEAOct 20 18:52
UA 1801Airbus A321neo
8h 17m·1 stop
$474 USDIADOct 20 06:10
→ORDOct 20 07:25
UA 2691Boeing 737MAX 9 Passenger
1h 20m layover
ORDOct 20 08:45
→SEAOct 20 11:27
UA 2099Airbus A321neo
8h 43m·1 stop
$474 USDIADOct 20 06:35
→SFOOct 20 09:23
UA 1095Boeing 757
42m layover
SFOOct 20 10:05
→SEAOct 20 12:18
UA 500Boeing 737
8h 47m·1 stop
$474 USDIADOct 20 08:30
→SFOOct 20 11:22
UA 1147Boeing 757
41m layover
SFOOct 20 12:03
→SEAOct 20 14:17
UA 2744Airbus A319
9h 5m·1 stop
$474 USDIADOct 20 09:28
→LAXOct 20 12:02
UA 657Boeing 737MAX 9 Passenger
42m layover
LAXOct 20 12:44
→SEAOct 20 15:33
UA 1295Boeing 737MAX 8 Passenger
8h 6m·1 stop
$594 USDIADOct 20 08:15
→DENOct 20 10:07
UA 797Boeing 737
1h 15m layover
DENOct 20 11:22
→SEAOct 20 13:21
UA 2058Boeing 737