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
Thursday, December 24th, 2026
Outbound Flights
6h 7m·Nonstop
$269 USD
IADDec 24 17:55
→SEADec 24 21:02
UA 1128Boeing 737MAX 9 Passenger
9h 18m·1 stop
$274 USDIADDec 24 06:10
→ORDDec 24 07:32
UA 565Boeing 737
1h 57m layover
ORDDec 24 09:29
→SEADec 24 12:28
UA 2099Airbus A321neo
6h 7m·Nonstop
$289 USDIADDec 24 08:50
→SEADec 24 11:57
UA 2731Boeing 737
9h 9m·1 stop
$381 USDIADDec 24 10:10
→ORDDec 24 11:37
UA 1252Boeing 737MAX 9 Passenger
1h 58m layover
ORDDec 24 13:35
→SEADec 24 16:19
UA 1764Boeing 737
17h 11m·1 stop
$401 USDIADDec 24 22:54
→IAHDec 25 01:30
UA 674Boeing 737
8h 25m layover
IAHDec 25 09:55
→SEADec 25 13:05
UA 1527Airbus A320
8h 51m·1 stop
$416 USDIADDec 24 06:05
→EWRDec 24 07:20
UA 1359Boeing 737MAX 9 Passenger
1h 15m layover
EWRDec 24 08:35
→SEADec 24 11:56
UA 1330Boeing 737
14h 37m·1 stop
$452 USDIADDec 24 22:12
→DENDec 25 00:15
UA 495Airbus A321neo
7h 25m layover
DENDec 25 07:40
→SEADec 25 09:49
UA 2271Boeing 737
8h 28m·1 stop
$567 USDIADDec 24 12:39
→DENDec 24 14:51
UA 1587Airbus A321neo
1h 14m layover
DENDec 24 16:05
→SEADec 24 18:07
UA 2013Boeing 737