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
Wednesday, October 21st, 2026
Outbound Flights
15h 44m·1 stop
$391 USD
IADOct 21 22:10
→LGAOct 21 23:30
UA 4026Embraer 175
8h 20m layover·Overnight
EWROct 22 07:50
→SEAOct 22 10:54
UA 1330Boeing 737MAX 9 Passenger
5h 46m·Nonstop
$464 USDIADOct 21 13:05
→SEAOct 21 15:51
UA 1824Boeing 737MAX 8 Passenger
5h 52m·Nonstop
$464 USDIADOct 21 17:45
→SEAOct 21 20:37
UA 1128Boeing 737MAX 9 Passenger
8h 6m·1 stop
$474 USDIADOct 21 08:15
→DENOct 21 10:09
UA 797Airbus A321neo
1h 13m layover
DENOct 21 11:22
→SEAOct 21 13:21
UA 2058Airbus A321neo
8h 17m·1 stop
$474 USDIADOct 21 06:10
→ORDOct 21 07:25
UA 2691Boeing 737MAX 9 Passenger
1h 20m layover
ORDOct 21 08:45
→SEAOct 21 11:27
UA 2099Airbus A321neo
8h 48m·1 stop
$474 USDIADOct 21 06:35
→SFOOct 21 09:23
UA 1095Boeing 757
45m layover
SFOOct 21 10:08
→SEAOct 21 12:23
UA 500Airbus A320
8h 47m·1 stop
$474 USDIADOct 21 08:30
→SFOOct 21 11:22
UA 1147Boeing 757
41m layover
SFOOct 21 12:03
→SEAOct 21 14:17
UA 2744Airbus A320
9h 22m·1 stop
$474 USDIADOct 21 09:28
→LAXOct 21 12:02
UA 657Boeing 737MAX 9 Passenger
53m layover
LAXOct 21 12:55
→SEAOct 21 15:50
UA 6043Embraer 175
8h 42m·1 stop
$474 USDIADOct 21 13:10
→ORDOct 21 14:26
UA 2331Boeing 737
1h 39m layover
ORDOct 21 16:05
→SEAOct 21 18:52
UA 1801Airbus A321neo