Live tracking not available yet
UA3900 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
IAD
Washington Dulles International Airport
Dulles
Scheduled 6:45 AM
ORD
Chicago O'Hare International Airport
Chicago
Scheduled 7:42 AM
1h 57m flight time
Tue
Recent Flights
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Schedule
Operates
Tue
Departure
6:45 AM
Arrival
7:42 AM
Duration
1h 57m
Operating Days
Mo
Tu
We
Th
Fr
Sa
Su
Schedule valid
Mar 17 —
Mar 24, 2026