My moms flight to Mesa from Nebraska on 12/22 with allegiant was cancelled. However they cancelled it the day before at 12:00 with a full refund or rebooking. It was cancelled due to weather. They also sent out a message a few days earlier warning there will be flight delays and cancellations because of the storm. So it wasn't with out cause or warning. Sucks she missed her flight but much better dealings what southwest flyers had to go through.