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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Sun
Fair Availability
38% of dates checked are available within 10% of the lowest price
Sunday, October 25th, 2026
Outbound Flights
9h 7m·1 stop
$279 USD
IADOct 25 06:12
→ORDOct 25 07:30
UA 565Boeing 737
1h 55m layover
ORDOct 25 09:25
→SEAOct 25 12:19
UA 2099Boeing 737
9h 5m·1 stop
$279 USDIADOct 25 06:15
→SFOOct 25 09:14
UA 1095Boeing 777
52m layover
SFOOct 25 10:06
→SEAOct 25 12:20
UA 2340Airbus A320
10h 9m·1 stop
$313 USDIADOct 25 08:23
→ORDOct 25 09:45
UA 1775Airbus A321neo
3h layover
ORDOct 25 12:45
→SEAOct 25 15:32
UA 1660Boeing 737
8h 17m·1 stop
$389 USDIADOct 25 10:15
→ORDOct 25 11:39
UA 1252Airbus A321neo
1h 6m layover
ORDOct 25 12:45
→SEAOct 25 15:32
UA 1660Boeing 737
6h 6m·Nonstop
$399 USDIADOct 25 17:50
→SEAOct 25 20:56
UA 1128Boeing 737MAX 8 Passenger
8h 48m·1 stop
$584 USDIADOct 25 13:15
→ORDOct 25 14:38
UA 2331Boeing 737MAX 8 Passenger
1h 37m layover
ORDOct 25 16:15
→SEAOct 25 19:03
UA 1801Airbus A321neo
9h 39m·1 stop
$584 USDIADOct 25 18:20
→SFOOct 25 21:29
UA 2786Boeing 757
1h 6m layover
SFOOct 25 22:35
→SEAOct 26 00:59
UA 5579Embraer 175
8h 58m·1 stop
$710 USDIADOct 25 12:35
→SFOOct 25 15:37
UA 1434Boeing 757
40m layover
SFOOct 25 16:17
→SEAOct 25 18:33
UA 2279Boeing 737MAX 8 Passenger