Frontier Airlines fares are economical as compare to others because of the following reasons:- No-frills base packages Frontier Airlines offers two types of fares:- THE WORKS THE PERKS These are the two types of ticket types that allow passengers to save more bucks. You will gain an immense amount of discounts on carry-on bags and checked bags. However, all those reservations which are made at the Frontier Airlines corporate office or over the call will incur additional fees excluding booking fees per passenger.