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 10th, 2026
Outbound Flights
5h 46m·Nonstop
$464 USD
IADOct 10 13:05
→SEAOct 10 15:51
UA 1824Boeing 737MAX 9 Passenger
5h 52m·Nonstop
$464 USDIADOct 10 17:45
→SEAOct 10 20:37
UA 1128Boeing 737
8h 47m·1 stop
$474 USDIADOct 10 08:30
→SFOOct 10 11:22
UA 1147Boeing 737
41m layover
SFOOct 10 12:03
→SEAOct 10 14:17
UA 2744Airbus A319
8h 17m·1 stop
$474 USDIADOct 10 06:10
→ORDOct 10 07:25
UA 2691Boeing 737
1h 20m layover
ORDOct 10 08:45
→SEAOct 10 11:27
UA 2099Airbus A321neo
8h 45m·1 stop
$474 USDIADOct 10 06:35
→SFOOct 10 09:23
UA 1095Boeing 757
42m layover
SFOOct 10 10:05
→SEAOct 10 12:20
UA 500Boeing 737
9h 44m·1 stop
$474 USDIADOct 10 07:00
→LAXOct 10 09:33
UA 2011Boeing 737MAX 9 Passenger
1h 12m layover
LAXOct 10 10:45
→SEAOct 10 13:44
UA 5271Embraer 175
8h 42m·1 stop
$474 USDIADOct 10 13:10
→ORDOct 10 14:26
UA 2331Boeing 737
1h 39m layover
ORDOct 10 16:05
→SEAOct 10 18:52
UA 1801Airbus A321neo
14h 20m·1 stop
$580 USDIADOct 10 22:18
→ORDOct 10 23:31
UA 421Boeing 737
7h 29m layover·Overnight
ORDOct 11 07:00
→SEAOct 11 09:38
UA 341Airbus A321neo