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
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Fair Availability
38% of dates checked are available within 10% of the lowest price
Wednesday, October 28th, 2026
Outbound Flights
6h 6m·Nonstop
$159 USD
IADOct 28 17:50
→SEAOct 28 20:56
UA 1128Boeing 737MAX 9 Passenger
8h 17m·1 stop
$169 USDIADOct 28 10:15
→ORDOct 28 11:38
UA 1252Boeing 737MAX 9 Passenger
1h 7m layover
ORDOct 28 12:45
→SEAOct 28 15:32
UA 1660Boeing 737
8h 48m·1 stop
$169 USDIADOct 28 13:15
→ORDOct 28 14:38
UA 2331Boeing 737
1h 37m layover
ORDOct 28 16:15
→SEAOct 28 19:03
UA 1801Airbus A321neo
9h 8m·1 stop
$169 USDIADOct 28 06:11
→ORDOct 28 07:30
UA 565Airbus A321neo
1h 55m layover
ORDOct 28 09:25
→SEAOct 28 12:19
UA 2099Boeing 737
9h 24m·1 stop
$169 USDIADOct 28 08:15
→SFOOct 28 11:22
UA 1147Boeing 757
1h layover
SFOOct 28 12:22
→SEAOct 28 14:39
UA 2744Airbus A320
9h 21m·1 stop
$169 USDIADOct 28 14:26
→SFOOct 28 17:35
UA 2862Boeing 737
55m layover
SFOOct 28 18:30
→SEAOct 28 20:47
UA 762Airbus A320
19h 45m·1 stop
$246 USDIADOct 28 22:47
→ORDOct 29 00:01
UA 421Boeing 737MAX 8 Passenger
12h 44m layover
ORDOct 29 12:45
→SEAOct 29 15:32
UA 1660Boeing 737
8h 17m·1 stop
$327 USDIADOct 28 12:40
→DENOct 28 14:48
UA 1587Airbus A321neo
1h 5m layover
DENOct 28 15:53
→SEAOct 28 17:57
UA 2013Boeing 737