I flew down southwest, last week. Lady sitting next to me said her son worked for allegiant. He has the ability to fly her on any airline, with same discounts except Delta.
She mentioned that he prefers not to fly her on allegiance. I figured it was due to going to Sanford. She said no she flys to 11 different cities that allegiance flys, She had only flown allegiant once. At the time I did not think to ask why.
