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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Wed
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Sun
Fair Availability
38% of dates checked are available within 10% of the lowest price
Sunday, October 11th, 2026
Outbound Flights
14h 7m·1 stop
$500 USD
IADOct 11 22:29
→ORDOct 11 23:43
UA 421Airbus A321neo
7h 17m layover·Overnight
ORDOct 12 07:00
→SEAOct 12 09:36
UA 341Boeing 737
8h 42m·1 stop
$563 USDIADOct 11 13:10
→ORDOct 11 14:26
UA 2331Boeing 737
1h 39m layover
ORDOct 11 16:05
→SEAOct 11 18:52
UA 1801Airbus A321neo
8h 17m·1 stop
$563 USDIADOct 11 06:10
→ORDOct 11 07:25
UA 2691Boeing 737MAX 9 Passenger
1h 20m layover
ORDOct 11 08:45
→SEAOct 11 11:27
UA 2099Airbus A321neo
5h 46m·Nonstop
$594 USDIADOct 11 13:05
→SEAOct 11 15:51
UA 1824Boeing 737MAX 9 Passenger
5h 52m·Nonstop
$594 USDIADOct 11 17:45
→SEAOct 11 20:37
UA 1128Boeing 737MAX 9 Passenger
8h 6m·1 stop
$604 USDIADOct 11 08:15
→DENOct 11 10:09
UA 797Airbus A321neo
1h 13m layover
DENOct 11 11:22
→SEAOct 11 13:21
UA 2058Boeing 737
8h 47m·1 stop
$604 USDIADOct 11 08:30
→SFOOct 11 11:22
UA 1147Boeing 757
41m layover
SFOOct 11 12:03
→SEAOct 11 14:17
UA 2744Airbus A319
9h 22m·1 stop
$604 USDIADOct 11 09:28
→LAXOct 11 12:02
UA 657Boeing 737MAX 9 Passenger
53m layover
LAXOct 11 12:55
→SEAOct 11 15:50
UA 6043Embraer 175
9h 38m·1 stop
$604 USDIADOct 11 18:37
→SFOOct 11 21:26
UA 2832Boeing 737MAX 9 Passenger
1h 19m layover
SFOOct 11 22:45
→SEAOct 12 01:15
UA 5579Embraer 175