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
Friday, October 9th, 2026
Outbound Flights
16h 55m·2 stops
$503 USD
IADOct 9 22:25
→ATLOct 10 00:23
UA 1357Boeing 737
6h 37m layover
ATLOct 10 07:00
→SFOOct 10 09:13
UA 571Boeing 737
52m layover
SFOOct 10 10:05
→SEAOct 10 12:20
UA 500Boeing 737
10h 31m·2 stops
$593 USDIADOct 9 08:20
→ATLOct 9 10:18
UA 2739Boeing 737MAX 9 Passenger
53m layover
ATLOct 9 11:11
→ORDOct 9 12:29
UA 1288Boeing 737
47m layover
ORDOct 9 13:16
→SEAOct 9 15:51
UA 1660Boeing 737
5h 46m·Nonstop
$594 USDIADOct 9 13:05
→SEAOct 9 15:51
UA 1824Boeing 737MAX 9 Passenger
5h 52m·Nonstop
$594 USDIADOct 9 17:45
→SEAOct 9 20:37
UA 1128Boeing 737MAX 9 Passenger
8h 47m·1 stop
$604 USDIADOct 9 08:30
→SFOOct 9 11:22
UA 1147Boeing 757
41m layover
SFOOct 9 12:03
→SEAOct 9 14:17
UA 2744Airbus A319
8h 48m·1 stop
$604 USDIADOct 9 06:35
→SFOOct 9 09:23
UA 1095Boeing 757
45m layover
SFOOct 9 10:08
→SEAOct 9 12:23
UA 500Airbus A320
9h 22m·1 stop
$604 USDIADOct 9 09:28
→LAXOct 9 12:02
UA 657Boeing 737MAX 9 Passenger
53m layover
LAXOct 9 12:55
→SEAOct 9 15:50
UA 6043Embraer 175
8h 42m·1 stop
$604 USDIADOct 9 13:10
→ORDOct 9 14:26
UA 2331Boeing 737
1h 39m layover
ORDOct 9 16:05
→SEAOct 9 18:52
UA 1801Airbus A321neo
9h 38m·1 stop
$604 USDIADOct 9 18:37
→SFOOct 9 21:26
UA 2832Boeing 737MAX 9 Passenger
1h 19m layover
SFOOct 9 22:45
→SEAOct 10 01:15
UA 5579Embraer 175