Live tracking not available yet
AZ4377 has a schedule in our database but isn't on the airport board right now. Live position data typically appears within a few hours of departure.
Flight Status
Scheduled
Route Info
SEA
Seattle–Tacoma International Airport
Seattle
Scheduled 8:00 AM
IAD
Washington Dulles International Airport
Dulles
Scheduled 4:02 PM
5h 2m flight time
Tue Thu Sun
Operated by United Airlines
Recent Flights
No flight history yet
History builds as this flight gets tracked
Schedule
Operating Days
Mo
Tu
We
Th
Fr
Sa
Su
Upcoming
Sun, Mar 22
Tue, Mar 24
Schedule valid
Mar 12 —
Mar 26, 2026