Seattle / Tacoma (SEA) to Washington (IAD) flight deal in economy from $209
SEASeattle–Tacoma International Airport
Seattle / Tacoma, United States
IADWashington Dulles International Airport
Washington, United States
$266 USD
-21%$209 USD
Verified 27 days agoOctober 2026
Mon
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Good Availability
40% of dates checked are available within 10% of the lowest price
Thursday, October 29th, 2026
Outbound Flights
4h 59m·Nonstop
$209 USD
SEAOct 29 08:09
→IADOct 29 16:08
UA 672Boeing 737MAX 8 Passenger
7h·1 stop
$219 USDSEAOct 29 14:30
→ORDOct 29 20:40
UA 2340Boeing 737
1h 1m layover
ORDOct 29 21:41
→IADOct 30 00:30
UA 1779Airbus A321neo
6h 53m·1 stop
$219 USDSEAOct 29 22:56
→ORDOct 30 05:06
UA 2614Boeing 737MAX 8 Passenger
49m layover
ORDOct 30 05:55
→IADOct 30 08:49
UA 1055Boeing 737MAX 9 Passenger
8h·1 stop
$219 USDSEAOct 29 08:30
→DENOct 29 12:14
UA 1505Boeing 737
1h 56m layover
DENOct 29 14:10
→IADOct 29 19:30
UA 347Airbus A321neo
8h 16m·1 stop
$219 USDSEAOct 29 10:40
→SFOOct 29 12:59
UA 737Airbus A320
51m layover
SFOOct 29 13:50
→IADOct 29 21:56
UA 1791Boeing 757
7h 30m·1 stop
$219 USDSEAOct 29 12:45
→DENOct 29 16:26
UA 1534Boeing 737
1h 29m layover
DENOct 29 17:55
→IADOct 29 23:15
UA 2408Airbus A321neo
7h 15m·1 stop
$219 USDSEAOct 29 19:04
→DENOct 29 22:45
UA 1218Boeing 737
1h 14m layover
DENOct 29 23:59
→IADOct 30 05:19
UA 1887Airbus A321neo
8h 28m·1 stop
$219 USDSEAOct 29 19:35
→SFOOct 29 21:50
UA 1334Boeing 737MAX 8 Passenger
1h 5m layover
SFOOct 29 22:55
→IADOct 30 07:03
UA 2111Boeing 737MAX 9 Passenger