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
Mon
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Fair Availability
38% of dates checked are available within 10% of the lowest price
Tuesday, December 15th, 2026
Outbound Flights
6h 6m·Nonstop
$209 USD
IADDec 15 17:55
→SEADec 15 21:01
UA 1128Boeing 737MAX 9 Passenger
8h 29m·1 stop
$219 USDIADDec 15 08:20
→DENDec 15 10:24
UA 792Boeing 777
1h 21m layover
DENDec 15 11:45
→SEADec 15 13:49
UA 310Boeing 737
8h 49m·1 stop
$219 USDIADDec 15 12:35
→DENDec 15 14:44
UA 561Airbus A321neo
1h 36m layover
DENDec 15 16:20
→SEADec 15 18:24
UA 2013Boeing 737
9h 3m·1 stop
$219 USDIADDec 15 06:15
→SFODec 15 09:22
UA 1095Boeing 737MAX 9 Passenger
43m layover
SFODec 15 10:05
→SEADec 15 12:18
UA 2192Airbus A320
10h 37m·1 stop
$219 USDIADDec 15 08:35
→LAXDec 15 11:24
UA 1734Boeing 757
1h 41m layover
LAXDec 15 13:05
→SEADec 15 16:12
UA 6043Embraer 175
9h 8m·1 stop
$219 USDIADDec 15 10:10
→ORDDec 15 11:33
UA 635Boeing 737MAX 9 Passenger
1h 57m layover
ORDDec 15 13:30
→SEADec 15 16:18
UA 2844Airbus A321neo
9h 37m·1 stop
$219 USDIADDec 15 12:55
→IAHDec 15 15:32
UA 1535Boeing 737
1h 3m layover
IAHDec 15 16:35
→SEADec 15 19:32
UA 1951Boeing 737MAX 9 Passenger
9h 12m·1 stop
$219 USDIADDec 15 14:35
→SFODec 15 17:46
UA 2862Boeing 737
47m layover
SFODec 15 18:33
→SEADec 15 20:47
UA 1497Airbus A320