🇺🇸 SEA
Seattle
2302 mi
IAD 🇺🇸
Dulles

Seattle to Dulles Flights

Seattle–Tacoma International Airport Washington Dulles International Airport 3 airlines

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The Seattle to Dulles route connects Seattle–Tacoma International Airport (SEA) in US with Washington Dulles International Airport (IAD) in US. This medium-haul flight covers approximately 2302 miles (3705 km) with a typical flight time of 4h 36m. This route is served by 3 airlines: Alaska Airlines, United, Delta Air Lines. AirportRoutes has tracked 4 unique flight numbers on this route.

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Departure Airport

Seattle–Tacoma International Airport

ICAO Code:
KSEA
IATA Code:
SEA
City:
🇺🇸 Seattle
Country:
US
Elevation:
433 ft

Destination Airport

Washington Dulles International Airport

ICAO Code:
KIAD
IATA Code:
IAD
City:
🇺🇸 Dulles
Country:
US
Elevation:
312 ft

3

Operators

4

Tracked Flights

2302

Miles

4h 36m

Flight Duration

Route Map

Operating Airlines

Airline ICAO IATA
Alaska Airlines ASA AS
United UAL UA
Delta Air Lines DAL DL

Flight Schedule Pattern

Day Flights Observed Frequency Activity
Monday 4 14%
Tuesday 2 7%
Wednesday 7 25%
Thursday 4 14%
Friday 2 7%
Saturday 6 21%
Sunday 3 11%

Pattern Analysis

4 Tracked Flights:
Data Points: 28
API observations used to build this analysis
Weekdays: 19 flights
Weekend: 9 flights
Business Route More active on weekdays

All Flight Routes

3 Routes
Note: This table shows aggregated route data by airline. Each airline may operate multiple daily flights at different times. See the "Spotted Departure Times" section below for all observed departure times.
Airline Flight Numbers Aircraft Type Typical Time Days Active Last Seen Status
B739 23:30 11:30 PM (Representative)
M T W T F S S
Jun 19, 2026 Active
BCS3 15:20 3:20 PM (Representative)
M T W T F S S
Jun 19, 2026 Active
United
UAL / UA
B738 08:00 8:00 AM (Representative)
M T W T F S S
Jun 19, 2026 Active
Total Routes: 3
Active Routes: 3
Unique Airlines: 3
Aircraft Types: 3

Spotted Departure Times

Departure Time Operator ICAO IATA
08:00 8:00 AM United UAL UA
15:20 3:20 PM Delta Air Lines DAL DL
23:30 11:30 PM Alaska Airlines ASA AS

Time Information

Times are shown in the departure airport's local timezone (KSEA - America/Los_Angeles).

Total Departure Times: 3
Time Range:
08:00 - 23:30
These are typical departure times observed from actual flights. Times may vary by season and schedule changes.