Worst airline possible for so many reasons. Avoid at all cost.
You are better off paying double to any other airline. I did arrive 40 minutes before departure at OAK because of bad traffic, but there were no boarding pass kiosks at the airport and no-one from Allegiant to be found. I had the Airport page an Allegiant representative several times and 25 minutes later one showed up to tell me we couldn't get on the plane. We could not get a boarding pass and missed the flight.
They also charge extra $ for seat assignments when you book the flight. That is sneaky and slimy.
Review about: Allegiant Air Flight.
Reason of review: Poor customer service.
Monetary Loss: $250.
Preferred solution: Price reduction.