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 agoNovember 2026
Mon
Tue
Wed
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Fri
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Sun
Fair Availability
38% of dates checked are available within 10% of the lowest price
Sunday, November 29th, 2026
Outbound Flights
23h 16m·1 stop
$611 USD
IADNov 29 22:47
→ORDNov 30 00:01
UA 421Boeing 737MAX 9 Passenger
16h 14m layover
ORDNov 30 16:15
→SEANov 30 19:03
UA 1801Airbus A321neo
6h 6m·Nonstop
$771 USDIADNov 29 17:50
→SEANov 29 20:56
UA 1128Boeing 737MAX 8 Passenger
9h 9m·1 stop
$825 USDIADNov 29 06:10
→ORDNov 29 07:29
UA 565Airbus A321neo
1h 56m layover
ORDNov 29 09:25
→SEANov 29 12:19
UA 2099Boeing 737
10h 9m·1 stop
$828 USDIADNov 29 08:23
→ORDNov 29 09:45
UA 1775Airbus A321neo
3h layover
ORDNov 29 12:45
→SEANov 29 15:32
UA 1660Boeing 737
11h 48m·1 stop
$832 USDIADNov 29 10:15
→ORDNov 29 11:39
UA 1252Airbus A321neo
4h 36m layover
ORDNov 29 16:15
→SEANov 29 19:03
UA 1801Airbus A321neo
8h 17m·1 stop
$878 USDIADNov 29 10:15
→ORDNov 29 11:39
UA 1252Airbus A321neo
1h 6m layover
ORDNov 29 12:45
→SEANov 29 15:32
UA 1660Boeing 737
8h 48m·1 stop
$951 USDIADNov 29 13:15
→ORDNov 29 14:38
UA 2331Boeing 737MAX 8 Passenger
1h 37m layover
ORDNov 29 16:15
→SEANov 29 19:03
UA 1801Airbus A321neo
8h 17m·1 stop
$1,074 USDIADNov 29 12:40
→DENNov 29 14:48
UA 1587Airbus A321neo
1h 5m layover
DENNov 29 15:53
→SEANov 29 17:57
UA 2013Boeing 737
8h 34m·1 stop
$1,096 USDIADNov 29 08:20
→DENNov 29 10:29
UA 792Airbus A321neo
1h 21m layover
DENNov 29 11:50
→SEANov 29 13:54
UA 2302Boeing 737