Originally Posted by
iahphx
I just looked at the October fares between PHL and MIA: a route I just flew on Frontier for $15, and which AA/US is clearly unhappy to have the competition.
But other than the weird (and unsustainable) $15 fares, it generally costs $30 more each way to fly AA/US instead of Frontier. That's pretty much Frontier's bag fee. So unless you're the unusual person who can travel with just a backback or insist on checking a bag instead of carrying it aboard, it's hard to understand why you'd fly Frontier unless you were unfamiliar with their additional fees.
My experiance is that Frontier passengers generally do understand the rules and act accordingly. Most don't have carry on bags and make do with a backpack. Of course I don't know how many checked bags. If I have to take a large bag I generally perfer to check it rather than carry it on.