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
Tue
Wed
Thu
Fri
Sat
Sun
Fair Availability
38% of dates checked are available within 10% of the lowest price
Wednesday, December 16th, 2026
Outbound Flights
9h 8m·1 stop
$219 USD
IADDec 16 10:10
→ORDDec 16 11:33
UA 635Boeing 737
1h 57m layover
ORDDec 16 13:30
→SEADec 16 16:18
UA 2844Airbus A321neo
9h 12m·1 stop
$219 USDIADDec 16 14:35
→SFODec 16 17:46
UA 2862Boeing 737MAX 9 Passenger
47m layover
SFODec 16 18:33
→SEADec 16 20:47
UA 1497Airbus A320
8h 5m·1 stop
$219 USDIADDec 16 17:40
→ORDDec 16 19:05
UA 2497Boeing 737
50m layover
ORDDec 16 19:55
→SEADec 16 22:45
UA 2211Airbus A320
8h 49m·1 stop
$239 USDIADDec 16 12:35
→DENDec 16 14:44
UA 561Airbus A321neo
1h 36m layover
DENDec 16 16:20
→SEADec 16 18:24
UA 2013Boeing 737
11h 8m·1 stop
$239 USDIADDec 16 06:15
→SFODec 16 09:22
UA 1095Boeing 737MAX 9 Passenger
2h 43m layover
SFODec 16 12:05
→SEADec 16 14:23
UA 1264Airbus A320
6h 6m·Nonstop
$241 USDIADDec 16 17:55
→SEADec 16 21:01
UA 1128Boeing 737MAX 9 Passenger
9h 5m·1 stop
$279 USDIADDec 16 06:15
→SFODec 16 09:22
UA 1095Boeing 737MAX 9 Passenger
43m layover
SFODec 16 10:05
→SEADec 16 12:20
UA 2192Airbus A320
8h 29m·1 stop
$332 USDIADDec 16 08:20
→DENDec 16 10:24
UA 792Boeing 777
1h 21m layover
DENDec 16 11:45
→SEADec 16 13:49
UA 310Boeing 737MAX 9 Passenger