Air travelers must commonly navigate a range of fees
Southwest Airlines and JetBlue Airways do not, although JetBlue is about to start charging for some types of tickets.
Large discounts are given for purchasing it in advance with Internet provider Gogo selling one-day passes for $16.
Discount airlines like Spirit, Allegiant and Frontier charge for things most fliers assume are free, like water, carry-on bag and printing a board pass at the airport.