Passenger complaints to the Transportation Department increased a bit last year.
These complaints come in even as airline companies have done a better job of have flights arrive on time and how they handle lost luggage.
The new complaint is that they are shrinking the size of the seats on airplanes in order to fit more seats.
The airlines can make more revenue by cramming more seats into a plane and selling that many more tickets.
Recent reports show airlines are looking to save even more space by shrinking the already tiny on-board bathrooms.
The problem only escalates when you add in the overbooked flights that happen.
In the past, airlines could pay off the ticket-holding customers that were denied a seat with a free ticket on another flight or cash.
But now, passengers aren't putting up with it. Flights are so full that passengers know being bumped to a later flight doesn't necessarily mean they will be guaranteed a seat on that one.
Complaints tend to be highest in the summer months when more people are flying.