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
Saturday, December 26th, 2026
Outbound Flights
6h 7m·Nonstop
$364 USD
IADDec 26 17:55
→SEADec 26 21:02
UA 1128Boeing 737MAX 9 Passenger
10h 14m·1 stop
$424 USDIADDec 26 06:10
→ORDDec 26 07:32
UA 565Boeing 737MAX 9 Passenger
3h 3m layover
ORDDec 26 10:35
→SEADec 26 13:24
UA 2099Boeing 737
6h 7m·Nonstop
$429 USDIADDec 26 08:50
→SEADec 26 11:57
UA 2731Boeing 737
9h 26m·2 stops
$506 USDIADDec 26 12:40
→CKBDec 26 13:45
UA 6071Canadair RJ 200
35m layover
CKBDec 26 14:20
→ORDDec 26 15:28
UA 6073Canadair RJ 200
52m layover
ORDDec 26 16:20
→SEADec 26 19:06
UA 1801Airbus A321neo
12h 1m·1 stop
$537 USDIADDec 26 10:05
→ORDDec 26 11:32
UA 1252Airbus A319
4h 48m layover
ORDDec 26 16:20
→SEADec 26 19:06
UA 1801Airbus A321neo
9h 14m·1 stop
$563 USDIADDec 26 10:05
→ORDDec 26 11:32
UA 1252Airbus A319
2h 3m layover
ORDDec 26 13:35
→SEADec 26 16:19
UA 1764Boeing 737
9h 1m·1 stop
$563 USDIADDec 26 13:05
→ORDDec 26 14:29
UA 2331Boeing 737MAX 9 Passenger
1h 51m layover
ORDDec 26 16:20
→SEADec 26 19:06
UA 1801Airbus A321neo
8h 41m·1 stop
$569 USDIADDec 26 06:05
→EWRDec 26 07:20
UA 1359Boeing 737MAX 9 Passenger
1h 5m layover
EWRDec 26 08:25
→SEADec 26 11:46
UA 1330Boeing 737