When asked why the marketplace shouldn't decide on the fees, Schumer argued that Spirit started the checked-baggage fee and other airlines quickly followed to make up for losses during 2008 when oil prices soared.
"Well the bottom line is what happened last time is it wasn't the marketplace deciding because Spirit did it," he said about the checked-bag fee.
So far, five airlines -- United, US Air, JetBlue, Delta and American -- have told Schumer they won't charge the carry-on fee.
Spirit Airlines plans to charge up to $45 for carry-on luggage that would be stowed in the overhead bin, citing shorter security lines and safer conditions for passengers. Baldanza has argued that his company offers cheaper fares so prices would still be lower to many destinations than competing airlines.