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 31st, 2026
Outbound Flights
10h 2m·1 stop
$239 USD
IADDec 31 15:30
→ORDDec 31 16:54
UA 1786Boeing 737
2h 48m layover
ORDDec 31 19:42
→SEADec 31 22:32
UA 2798Airbus A321neo
11h 22m·1 stop
$239 USDIADDec 31 06:00
→SFODec 31 09:11
UA 1095Boeing 737MAX 9 Passenger
2h 57m layover
SFODec 31 12:08
→SEADec 31 14:22
UA 1380Boeing 737MAX 8 Passenger
6h 7m·Nonstop
$263 USDIADDec 31 08:50
→SEADec 31 11:57
UA 2731Boeing 737
6h 7m·Nonstop
$263 USDIADDec 31 17:55
→SEADec 31 21:02
UA 1128Boeing 737MAX 9 Passenger
8h 51m·1 stop
$277 USDIADDec 31 06:05
→EWRDec 31 07:20
UA 1359Boeing 737MAX 9 Passenger
1h 15m layover
EWRDec 31 08:35
→SEADec 31 11:56
UA 1330Boeing 737
9h 9m·1 stop
$279 USDIADDec 31 10:10
→ORDDec 31 11:37
UA 1252Boeing 737
1h 58m layover
ORDDec 31 13:35
→SEADec 31 16:19
UA 1764Boeing 737MAX 9 Passenger
9h 2m·1 stop
$296 USDIADDec 31 13:04
→ORDDec 31 14:28
UA 2331Boeing 737MAX 9 Passenger
1h 52m layover
ORDDec 31 16:20
→SEADec 31 19:06
UA 1801Airbus A321neo
8h 28m·1 stop
$386 USDIADDec 31 12:39
→DENDec 31 14:51
UA 1587Airbus A321neo
1h 14m layover
DENDec 31 16:05
→SEADec 31 18:07
UA 2013Boeing 737