Continental Airlines is watching how the $15 fee on a first checked bag works at other airlines before deciding whether to ask passengers to pay up.
Chairman and Chief Executive Lawrence Kellner says the fee can raise a lot of money but might cause delays in boarding the plane.
American Airlines was the first major carrier to charge a fee for checking one bag, and United Airlines and US Airways have followed.
Kellner said at an investor conference Wednesday that he is studying whether passengers prefer airlines that don't charge the fee.
"I also think there are operational impacts on a first-bag fee where you will have some delays," he said. "My general view is if those people need a product, how do we put that in an all-inclusive fare?"