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
Monday, October 19th, 2026
Outbound Flights
15h 44m·1 stop
$460 USD
IADOct 19 22:10
→LGAOct 19 23:30
UA 4026Embraer 175
8h 20m layover·Overnight
EWROct 20 07:50
→SEAOct 20 10:54
UA 1330Boeing 737MAX 9 Passenger
5h 52m·Nonstop
$464 USDIADOct 19 17:45
→SEAOct 19 20:37
UA 1128Boeing 737MAX 9 Passenger
9h 22m·1 stop
$474 USDIADOct 19 09:28
→LAXOct 19 12:02
UA 657Boeing 737MAX 9 Passenger
53m layover
LAXOct 19 12:55
→SEAOct 19 15:50
UA 6043Embraer 175
8h 43m·1 stop
$474 USDIADOct 19 06:35
→SFOOct 19 09:23
UA 1095Boeing 757
42m layover
SFOOct 19 10:05
→SEAOct 19 12:18
UA 500Boeing 737
8h 41m·1 stop
$474 USDIADOct 19 12:38
→EWROct 19 14:09
UA 1498Boeing 737MAX 9 Passenger
1h 9m layover
EWROct 19 15:18
→SEAOct 19 18:19
UA 1814Boeing 737MAX 9 Passenger
8h 42m·1 stop
$474 USDIADOct 19 13:10
→ORDOct 19 14:26
UA 2331Boeing 737
1h 39m layover
ORDOct 19 16:05
→SEAOct 19 18:52
UA 1801Airbus A321neo
9h 38m·1 stop
$474 USDIADOct 19 18:37
→SFOOct 19 21:26
UA 2832Boeing 737MAX 9 Passenger
1h 19m layover
SFOOct 19 22:45
→SEAOct 20 01:15
UA 5579Embraer 175
5h 46m·Nonstop
$529 USDIADOct 19 13:05
→SEAOct 19 15:51
UA 1824Boeing 737MAX 9 Passenger
8h 47m·1 stop
$539 USDIADOct 19 08:30
→SFOOct 19 11:22
UA 1147Boeing 757
41m layover
SFOOct 19 12:03
→SEAOct 19 14:17
UA 2744Airbus A319
8h 17m·1 stop
$570 USDIADOct 19 06:10
→ORDOct 19 07:25
UA 2691Boeing 737MAX 9 Passenger
1h 20m layover
ORDOct 19 08:45
→SEAOct 19 11:27
UA 2099Airbus A321neo