Frontier Airlines made a surprising move, lowering its ticket change fees. It will now have one of the most generous policies among U.S. carriers. The biggest change in their fee schedule if for travelers who change a ticket more than 90 days before departure. it would previously cost you $99 to do so, but form now on it will be free.
Changes less than 90 days before their trip but at least two weeks before their trip will cost $49, down from $99. The fee for changes made 13 days or less from travel will remain at $99. In all cases, travelers must still pay any fare difference.