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
Tuesday, December 1st, 2026
Outbound Flights
21h 53m·2 stops
$263 USD
IADDec 1 19:30
→LASDec 1 21:48
UA 1764Boeing 737MAX 9 Passenger
11h 56m layover·Overnight
LASDec 2 09:44
→SFODec 2 11:30
UA 1264Boeing 737
35m layover
SFODec 2 12:05
→SEADec 2 14:23
UA 1264Airbus A320
6h 6m·Nonstop
$298 USDIADDec 1 17:55
→SEADec 1 21:01
UA 1128Boeing 737MAX 9 Passenger
9h 8m·1 stop
$329 USDIADDec 1 10:10
→ORDDec 1 11:34
UA 635Airbus A321neo
1h 56m layover
ORDDec 1 13:30
→SEADec 1 16:18
UA 2844Airbus A321neo
9h 56m·1 stop
$446 USDIADDec 1 06:05
→EWRDec 1 07:20
UA 1359Boeing 737
2h 20m layover
EWRDec 1 09:40
→SEADec 1 13:01
UA 1330Boeing 737MAX 8 Passenger
10h 37m·1 stop
$491 USDIADDec 1 08:35
→LAXDec 1 11:24
UA 1734Boeing 757
1h 41m layover
LAXDec 1 13:05
→SEADec 1 16:12
UA 6043Embraer 175
8h 49m·1 stop
$597 USDIADDec 1 12:35
→DENDec 1 14:44
UA 1587Airbus A321neo
1h 36m layover
DENDec 1 16:20
→SEADec 1 18:24
UA 2013Boeing 737
8h 27m·1 stop
$604 USDIADDec 1 08:22
→DENDec 1 10:26
UA 792Boeing 777
1h 19m layover
DENDec 1 11:45
→SEADec 1 13:49
UA 310Boeing 737
9h 37m·1 stop
$604 USDIADDec 1 12:55
→IAHDec 1 15:32
UA 1535Boeing 737MAX 9 Passenger
1h 3m layover
IAHDec 1 16:35
→SEADec 1 19:32
UA 1951Boeing 737MAX 9 Passenger
9h 12m·1 stop
$604 USDIADDec 1 14:35
→SFODec 1 17:46
UA 2862Boeing 737MAX 9 Passenger
47m layover
SFODec 1 18:33
→SEADec 1 20:47
UA 1497Airbus A320