One thing to note: there are possibly codeshare with Allegiant Air and Viva Aerobus.
Check flight status of both Allegiant Air arriving and departing flights today
Check in at Terminal-1, walk to TBIT-Tom Bradley where flights arrive and depart We suggest you first check the TSA security wait times and our suggested arrival time to LAX based on your flight departure. Generally, travelers check-in at the desks labeled Allegiant Air, however, you can also use the Allegiant Air mobile app or website to check-in 24 hours prior to your flight departure.