An awkward, reclusive, unusual young man with a wealth of trust fund money strikes up a friend with a hapless anti-obesity crusader who comes knocking on his door for donations.
American Airlines has a whopping $200 change fee on paid fares (other than full fare refundable tickets) for domestic flights, and up to $450 for international flights. Same day changes are $75 in economy and free for business and first class passengers on paid fares.
Domestic change fees on other U.S. airlines are $75 on Alaska; $100 on Frontier, JetBlue and Virgin America; and $125 on Spirit. It's not just the change fee you'll have to pay. If the new ticket you book is more expensive, you'll have to pay the difference plus the change fee.