Checked Baggage: $10-$100

The nation's largest carrier, American Airlines, made headlines when it announced that discount ticketed passengers would be charged $15 for checked baggage starting June 15. Consumer rights advocates are in an uproar, but American won't actually be the first U.S.-based airline with a checked-baggage fee. Effective June 10, Spirit passengers will shell out $5 to $10 each way for the first two bags and a whopping $100 for each item thereafter. The other majors haven't announced their plans for future baggage fees but Continental, Delta, Northwest, United and US Airways all charge $25 to check a second bag.