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
Thu
Fri
Sat
Sun
Fair Availability
38% of dates checked are available within 10% of the lowest price
Sunday, November 1st, 2026
Outbound Flights
16h 4m·1 stop
$267 USD
IADNov 1 22:10
→LAXNov 2 00:59
UA 1385Boeing 737MAX 9 Passenger
7h 16m layover
LAXNov 2 08:15
→SEANov 2 11:14
UA 726Boeing 737
6h 6m·Nonstop
$269 USDIADNov 1 17:50
→SEANov 1 20:56
UA 1128Boeing 737MAX 8 Passenger
9h 5m·1 stop
$279 USDIADNov 1 06:15
→SFONov 1 09:19
UA 1095Boeing 757
47m layover
SFONov 1 10:06
→SEANov 1 12:20
UA 2340Airbus A320
9h 24m·1 stop
$310 USDIADNov 1 08:15
→SFONov 1 11:24
UA 1147Boeing 737MAX 9 Passenger
58m layover
SFONov 1 12:22
→SEANov 1 14:39
UA 2744Airbus A320
9h 39m·1 stop
$310 USDIADNov 1 18:20
→SFONov 1 21:29
UA 2786Boeing 737MAX 9 Passenger
1h 6m layover
SFONov 1 22:35
→SEANov 2 00:59
UA 5579Embraer 175
10h 57m·1 stop
$311 USDIADNov 1 10:00
→DENNov 1 12:09
UA 1865Airbus A321neo
3h 44m layover
DENNov 1 15:53
→SEANov 1 17:57
UA 2013Boeing 737
8h 21m·1 stop
$324 USDIADNov 1 10:15
→ORDNov 1 11:39
UA 1252Airbus A321neo
1h 10m layover
ORDNov 1 12:49
→SEANov 1 15:36
UA 1660Boeing 737
8h 48m·1 stop
$332 USDIADNov 1 13:15
→ORDNov 1 14:38
UA 2331Boeing 737MAX 8 Passenger
1h 37m layover
ORDNov 1 16:15
→SEANov 1 19:03
UA 1801Airbus A321neo
9h 9m·1 stop
$398 USDIADNov 1 14:38
→SFONov 1 17:47
UA 2862Boeing 737
43m layover
SFONov 1 18:30
→SEANov 1 20:47
UA 762Airbus A320