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 agoOctober 2026
Mon
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Sun
Fair Availability
38% of dates checked are available within 10% of the lowest price
Saturday, October 31st, 2026
Outbound Flights
12h 26m·1 stop
$327 USD
IADOct 31 12:45
→LGAOct 31 14:15
UA 3698Embraer 175
4h 32m layover
EWROct 31 18:47
→SEAOct 31 22:11
UA 2614Boeing 737MAX 9 Passenger
6h 6m·Nonstop
$354 USDIADOct 31 17:50
→SEAOct 31 20:56
UA 1128Boeing 737MAX 8 Passenger
8h 19m·1 stop
$364 USDIADOct 31 12:40
→DENOct 31 14:48
UA 1587Airbus A321neo
1h 7m layover
DENOct 31 15:55
→SEAOct 31 17:59
UA 2013Boeing 737
8h 46m·1 stop
$364 USDIADOct 31 13:17
→ORDOct 31 14:40
UA 2331Boeing 737
1h 35m layover
ORDOct 31 16:15
→SEAOct 31 19:03
UA 1801Airbus A321neo
9h 5m·1 stop
$364 USDIADOct 31 06:15
→SFOOct 31 09:19
UA 1095Boeing 757
47m layover
SFOOct 31 10:06
→SEAOct 31 12:20
UA 2340Airbus A320
8h 35m·1 stop
$364 USDIADOct 31 08:20
→DENOct 31 10:29
UA 792Airbus A321neo
1h 21m layover
DENOct 31 11:50
→SEAOct 31 13:55
UA 2302Airbus A321neo
10h 12m·1 stop
$364 USDIADOct 31 09:00
→LAXOct 31 11:54
UA 1897Airbus A321neo
1h 11m layover
LAXOct 31 13:05
→SEAOct 31 16:12
UA 6043Embraer 175
10h 2m·1 stop
$364 USDIADOct 31 09:25
→SFOOct 31 12:34
UA 271Boeing 737MAX 9 Passenger
1h 36m layover
SFOOct 31 14:10
→SEAOct 31 16:27
UA 433Airbus A319
9h 9m·1 stop
$364 USDIADOct 31 14:38
→SFOOct 31 17:47
UA 2862Boeing 737
43m layover
SFOOct 31 18:30
→SEAOct 31 20:47
UA 762Airbus A320