Today, an airline base fare is not the total amount you will pay. Today each U.S. airline is unique with the their add-on charges. USA Today examines the extra fees and the rules for each additional charge.

USA Today compares the add-on fees for the following airlines:

Alaska Airlines

Allegiant Air

American Airlines

Delta Air Lines

Frontier Airlines

JetBlue Airways

Southwest Airlines

Spirit Airlines

United Airlines

US Airways

Virgin America

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