Live tracking not available yet
UA421 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
DEN
Denver International Airport
Denver
Gate B8 Scheduled 5:21 PM
Actual 5:25 PM
SDF
Louisville Muhammad Ali International Airport
Louisville
Scheduled 9:50 PM
Actual 9:59 PM
2h 29m flight time
Daily
Recent Flights
Last 1 observedMar 16
Mon
SNA
DEN
Dep 11:15:00
(actual 11:30:00)
7M8
Boarding
Schedule
Operates
Daily
Departure
5:21 PM
Arrival
9:50 PM
Duration
2h 29m
Aircraft
Airbus A319
Gate
B8
Actual
17:25
21:59
Operating Days
Mo
Tu
We
Th
Fr
Sa
Su
Upcoming
Thu, Mar 19
Fri, Mar 20
Sat, Mar 21
Sun, Mar 22
Mon, Mar 23
Tue, Mar 24
Wed, Mar 25
Schedule valid
Mar 13 —
Mar 28, 2026