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
Monday, October 26th, 2026
Outbound Flights
16h 6m·1 stop
$327 USD
IADOct 26 22:10
→LGAOct 26 23:34
UA 4026Embraer 175
8h 21m layover·Overnight
EWROct 27 07:55
→SEAOct 27 11:16
UA 1330Boeing 737
6h 6m·Nonstop
$344 USDIADOct 26 17:50
→SEAOct 26 20:56
UA 1128Boeing 737MAX 8 Passenger
9h 5m·1 stop
$354 USDIADOct 26 06:15
→SFOOct 26 09:19
UA 1095Boeing 757
47m layover
SFOOct 26 10:06
→SEAOct 26 12:20
UA 2340Airbus A320
8h 48m·1 stop
$354 USDIADOct 26 13:15
→ORDOct 26 14:38
UA 2331Boeing 737
1h 37m layover
ORDOct 26 16:15
→SEAOct 26 19:03
UA 1801Airbus A321neo
9h 9m·1 stop
$354 USDIADOct 26 14:38
→SFOOct 26 17:47
UA 2862Boeing 737
43m layover
SFOOct 26 18:30
→SEAOct 26 20:47
UA 762Airbus A320
9h 8m·1 stop
$354 USDIADOct 26 06:11
→ORDOct 26 07:30
UA 565Airbus A321neo
1h 55m layover
ORDOct 26 09:25
→SEAOct 26 12:19
UA 2099Boeing 737
9h 39m·1 stop
$354 USDIADOct 26 18:20
→SFOOct 26 21:29
UA 2786Boeing 737MAX 9 Passenger
1h 6m layover
SFOOct 26 22:35
→SEAOct 27 00:59
UA 5903Embraer 175
9h 24m·1 stop
$386 USDIADOct 26 08:15
→SFOOct 26 11:22
UA 1147Boeing 757
1h layover
SFOOct 26 12:22
→SEAOct 26 14:39
UA 2744Airbus A320
10h 9m·1 stop
$386 USDIADOct 26 08:23
→ORDOct 26 09:45
UA 1775Airbus A321neo
3h layover
ORDOct 26 12:45
→SEAOct 26 15:32
UA 1660Boeing 737
10h 47m·1 stop
$386 USDIADOct 26 08:25
→LAXOct 26 11:14
UA 1734Boeing 757
1h 51m layover
LAXOct 26 13:05
→SEAOct 26 16:12
UA 6043Embraer 175
8h 17m·1 stop
$469 USDIADOct 26 10:15
→ORDOct 26 11:38
UA 1252Boeing 737MAX 9 Passenger
1h 7m layover
ORDOct 26 12:45
→SEAOct 26 15:32
UA 1660Boeing 737