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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Fair Availability
38% of dates checked are available within 10% of the lowest price
Thursday, October 29th, 2026
Outbound Flights
6h 6m·Nonstop
$209 USD
IADOct 29 17:50
→SEAOct 29 20:56
UA 1128Boeing 737MAX 8 Passenger
8h 17m·1 stop
$219 USDIADOct 29 10:15
→ORDOct 29 11:38
UA 1252Boeing 737MAX 9 Passenger
1h 7m layover
ORDOct 29 12:45
→SEAOct 29 15:32
UA 1660Boeing 737
8h 17m·1 stop
$219 USDIADOct 29 12:40
→DENOct 29 14:48
UA 1587Airbus A321neo
1h 5m layover
DENOct 29 15:53
→SEAOct 29 17:57
UA 2013Boeing 737
9h 8m·1 stop
$219 USDIADOct 29 06:11
→ORDOct 29 07:30
UA 565Airbus A321neo
1h 55m layover
ORDOct 29 09:25
→SEAOct 29 12:19
UA 2099Boeing 737
9h 5m·1 stop
$219 USDIADOct 29 06:15
→SFOOct 29 09:19
UA 1095Boeing 757
47m layover
SFOOct 29 10:06
→SEAOct 29 12:20
UA 2340Airbus A320
9h 24m·1 stop
$219 USDIADOct 29 08:15
→SFOOct 29 11:22
UA 1147Boeing 757
1h layover
SFOOct 29 12:22
→SEAOct 29 14:39
UA 2744Airbus A320
8h 48m·1 stop
$219 USDIADOct 29 13:15
→ORDOct 29 14:38
UA 2331Boeing 737MAX 8 Passenger
1h 37m layover
ORDOct 29 16:15
→SEAOct 29 19:03
UA 1801Airbus A321neo
9h 9m·1 stop
$219 USDIADOct 29 14:38
→SFOOct 29 17:47
UA 2862Boeing 737
43m layover
SFOOct 29 18:30
→SEAOct 29 20:47
UA 762Airbus A320
9h 39m·1 stop
$219 USDIADOct 29 18:20
→SFOOct 29 21:29
UA 2786Boeing 737MAX 9 Passenger
1h 6m layover
SFOOct 29 22:35
→SEAOct 30 00:59
UA 5579Embraer 175