> I don't see why anyone would fly United, Southwest, American Airlines, etc VS.the budget Airlines like Spirit.
I'm on a spoke (not a hub) and just don't have the service available to use budget airlines even if I wanted to. We have JetBlue -- they fly to Boston and that's it. We have Allegiant and they fly to Phoenix (not really Phoenix -- Mesa), and we have Avelo they they fly to LA (not really LA: Burbank). All these airlines fly one flight per day, and often not every day of the week. When I'm traveling somewhere that works for the budget airlines, I'm still leery because if their plane breaks down or there is "weather in Cincinnati", I'm screwed. They don't have a second plane available.
otoh we have United, Delta, American, Alaska, Southwest with flights to several hubs each, multiple flights per day, through international ticketing, first class sometimes open... Plus I don't pay for luggage on the major carriers due to credit card membership/status.