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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Sun
Fair Availability
38% of dates checked are available within 10% of the lowest price
Thursday, December 17th, 2026
Outbound Flights
11h 22m·1 stop
$239 USD
IADDec 17 06:00
→SFODec 17 09:11
UA 1095Boeing 737MAX 9 Passenger
2h 57m layover
SFODec 17 12:08
→SEADec 17 14:22
UA 1730Boeing 737MAX 8 Passenger
10h 2m·1 stop
$239 USDIADDec 17 15:30
→ORDDec 17 16:54
UA 1786Boeing 737
2h 48m layover
ORDDec 17 19:42
→SEADec 17 22:32
UA 2798Airbus A321neo
9h 1m·1 stop
$251 USDIADDec 17 13:05
→ORDDec 17 14:29
UA 2331Boeing 737MAX 9 Passenger
1h 51m layover
ORDDec 17 16:20
→SEADec 17 19:06
UA 1801Airbus A321neo
11h 17m·1 stop
$260 USDIADDec 17 08:15
→SFODec 17 11:11
UA 1607Boeing 787
3h 9m layover
SFODec 17 14:20
→SEADec 17 16:32
UA 433Boeing 737
9h 7m·1 stop
$266 USDIADDec 17 08:15
→SFODec 17 11:11
UA 1607Boeing 787
57m layover
SFODec 17 12:08
→SEADec 17 14:22
UA 1730Boeing 737MAX 8 Passenger
10h 12m·1 stop
$279 USDIADDec 17 09:20
→SFODec 17 12:30
UA 770Boeing 737MAX 9 Passenger
1h 50m layover
SFODec 17 14:20
→SEADec 17 16:32
UA 433Boeing 737
6h 7m·Nonstop
$286 USDIADDec 17 08:50
→SEADec 17 11:57
UA 2731Boeing 737
6h 7m·Nonstop
$286 USDIADDec 17 17:55
→SEADec 17 21:02
UA 1128Boeing 737MAX 9 Passenger
9h 9m·1 stop
$300 USDIADDec 17 10:10
→ORDDec 17 11:37
UA 1252Boeing 737
1h 58m layover
ORDDec 17 13:35
→SEADec 17 16:19
UA 1764Boeing 737