The numbers we have are only for the first three months of this year, when traveling is generally light. Still, U.S. airlines manage to collect $1.38 billion from baggage fees and reservation change fees in the first quarter.
The Department of Transportation says airlines collected $784 million from baggage fees and almost $600 million from change fees.
These aren't the only fees charged by the airlines; there are legroom fees and early boarding fees, to name two of them.
New rules have been proposed to require airlines to disclose how much they make from those fees as well.