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
Friday, December 25th, 2026
Outbound Flights
8h 12m·1 stop
$239 USD
IADDec 25 17:20
→ORDDec 25 18:50
UA 2497Boeing 737
52m layover
ORDDec 25 19:42
→SEADec 25 22:32
UA 2798Airbus A321neo
9h 5m·1 stop
$251 USDIADDec 25 13:01
→ORDDec 25 14:24
UA 2331Boeing 737MAX 9 Passenger
1h 56m layover
ORDDec 25 16:20
→SEADec 25 19:06
UA 1801Airbus A321neo
6h 7m·Nonstop
$269 USDIADDec 25 08:50
→SEADec 25 11:57
UA 2731Boeing 737
6h 7m·Nonstop
$269 USDIADDec 25 17:55
→SEADec 25 21:02
UA 1128Boeing 737MAX 9 Passenger
9h 9m·1 stop
$324 USDIADDec 25 10:10
→ORDDec 25 11:37
UA 1252Airbus A319
1h 58m layover
ORDDec 25 13:35
→SEADec 25 16:19
UA 1764Boeing 737MAX 9 Passenger
8h 28m·1 stop
$425 USDIADDec 25 12:39
→DENDec 25 14:51
UA 1587Airbus A321neo
1h 14m layover
DENDec 25 16:05
→SEADec 25 18:07
UA 2013Boeing 737
16h 2m·1 stop
$550 USDIADDec 25 22:44
→EWRDec 25 23:59
UA 1168Boeing 737
8h 26m layover·Overnight
EWRDec 26 08:25
→SEADec 26 11:46
UA 1330Boeing 737
9h·1 stop
$604 USDIADDec 25 14:40
→SFODec 25 17:50
UA 2862Boeing 737MAX 9 Passenger
42m layover
SFODec 25 18:32
→SEADec 25 20:40
UA 2159Boeing 737