What it is A high fee to rebook your flight if your plans change
What's so bad The top fee has doubled over the past few years.
Ouch! $175-$250 (depending on class of service) at Virgin Atlantic; $100 at American, Continental, United and US Airways
What you can do Pay more for a refundable ticket or fly on low-cost airlines. JetBlue charges $25 to $30. Southwest lets you change your flight for free.