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
Monday, December 14th, 2026
Outbound Flights
6h 6m·Nonstop
$229 USD
IADDec 14 17:55
→SEADec 14 21:01
UA 1128Boeing 737MAX 9 Passenger
9h 3m·1 stop
$239 USDIADDec 14 06:15
→SFODec 14 09:22
UA 1095Boeing 737MAX 9 Passenger
43m layover
SFODec 14 10:05
→SEADec 14 12:18
UA 2192Airbus A320
9h 8m·1 stop
$239 USDIADDec 14 08:15
→SFODec 14 11:20
UA 1147Boeing 757
45m layover
SFODec 14 12:05
→SEADec 14 14:23
UA 1264Airbus A320
9h 8m·1 stop
$239 USDIADDec 14 10:10
→ORDDec 14 11:33
UA 635Boeing 737
1h 57m layover
ORDDec 14 13:30
→SEADec 14 16:18
UA 2844Airbus A321neo
10h 37m·1 stop
$239 USDIADDec 14 08:35
→LAXDec 14 11:24
UA 1734Boeing 757
1h 41m layover
LAXDec 14 13:05
→SEADec 14 16:12
UA 6043Embraer 175
9h 37m·1 stop
$239 USDIADDec 14 12:55
→IAHDec 14 15:32
UA 1535Boeing 737
1h 3m layover
IAHDec 14 16:35
→SEADec 14 19:32
UA 1951Boeing 737MAX 9 Passenger
9h 12m·1 stop
$239 USDIADDec 14 14:35
→SFODec 14 17:46
UA 2862Boeing 737MAX 9 Passenger
47m layover
SFODec 14 18:33
→SEADec 14 20:47
UA 1497Airbus A320
8h 49m·1 stop
$278 USDIADDec 14 12:35
→DENDec 14 14:44
UA 561Airbus A321neo
1h 36m layover
DENDec 14 16:20
→SEADec 14 18:24
UA 2013Boeing 737