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
Saturday, October 17th, 2026
Outbound Flights
12h 56m·1 stop
$327 USD
IADOct 17 12:40
→LGAOct 17 14:09
UA 4012Embraer 175
5h 16m layover
EWROct 17 19:25
→SEAOct 17 22:36
UA 2693Boeing 737MAX 8 Passenger
5h 46m·Nonstop
$344 USDIADOct 17 13:05
→SEAOct 17 15:51
UA 1824Boeing 737MAX 9 Passenger
5h 52m·Nonstop
$344 USDIADOct 17 17:45
→SEAOct 17 20:37
UA 1128Boeing 737
8h 47m·1 stop
$354 USDIADOct 17 08:30
→SFOOct 17 11:22
UA 1147Boeing 757
41m layover
SFOOct 17 12:03
→SEAOct 17 14:17
UA 2744Airbus A319
8h 17m·1 stop
$354 USDIADOct 17 06:10
→ORDOct 17 07:25
UA 2691Boeing 737
1h 20m layover
ORDOct 17 08:45
→SEAOct 17 11:27
UA 2099Airbus A321neo
8h 45m·1 stop
$354 USDIADOct 17 06:35
→SFOOct 17 09:23
UA 1095Boeing 757
42m layover
SFOOct 17 10:05
→SEAOct 17 12:20
UA 500Boeing 737
9h 44m·1 stop
$354 USDIADOct 17 07:00
→LAXOct 17 09:33
UA 2011Boeing 737MAX 9 Passenger
1h 12m layover
LAXOct 17 10:45
→SEAOct 17 13:44
UA 5271Embraer 175
8h 42m·1 stop
$354 USDIADOct 17 13:10
→ORDOct 17 14:26
UA 2331Boeing 737
1h 39m layover
ORDOct 17 16:05
→SEAOct 17 18:52
UA 1801Airbus A321neo