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 agoDecember 2026
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Fair Availability
38% of dates checked are available within 10% of the lowest price
Saturday, December 5th, 2026
Outbound Flights
6h 6m·Nonstop
$209 USD
IADDec 5 17:55
→SEADec 5 21:01
UA 1128Boeing 737MAX 9 Passenger
9h 8m·1 stop
$219 USDIADDec 5 10:10
→ORDDec 5 11:33
UA 635Boeing 737
1h 57m layover
ORDDec 5 13:30
→SEADec 5 16:18
UA 2844Airbus A321neo
8h 49m·1 stop
$219 USDIADDec 5 12:35
→DENDec 5 14:44
UA 561Airbus A321neo
1h 36m layover
DENDec 5 16:20
→SEADec 5 18:24
UA 2013Boeing 737
9h 7m·1 stop
$219 USDIADDec 5 14:40
→SFODec 5 17:50
UA 2862Boeing 757
43m layover
SFODec 5 18:33
→SEADec 5 20:47
UA 1497Airbus A320
10h 22m·1 stop
$219 USDIADDec 5 06:00
→IAHDec 5 08:36
UA 451Boeing 737MAX 9 Passenger
1h 44m layover
IAHDec 5 10:20
→SEADec 5 13:22
UA 1062Boeing 737MAX 8 Passenger
9h 7m·1 stop
$219 USDIADDec 5 08:15
→SFODec 5 11:20
UA 1147Boeing 757
45m layover
SFODec 5 12:05
→SEADec 5 14:22
UA 1264Boeing 737
9h 37m·1 stop
$263 USDIADDec 5 12:55
→IAHDec 5 15:32
UA 1535Boeing 737
1h 3m layover
IAHDec 5 16:35
→SEADec 5 19:32
UA 1951Boeing 737
8h 29m·1 stop
$294 USDIADDec 5 08:20
→DENDec 5 10:24
UA 792Boeing 777
1h 21m layover
DENDec 5 11:45
→SEADec 5 13:49
UA 310Boeing 737