You need to check with your status, and with who you bought the ticket on the rules (
https://www.aa.com/i18n/utility/sameDayTravel.jsp). If I intrepert the rules here for elite status benefits (
https://www.aa.com/i18n/AAdvantage/e...fits-chart.jsp) for Gold on US Airways you maybe able to do it with a waived fee; however, I have personally found that the US Airways folks are extremely confused on the benefits. I have had several run-ins with them as an EXP on both first class and coach tickets. Patience and a smile usually helps ... but beware of the battlefield fun ... If you want to feel safe you can change now for $200+, or you can call in the day of and attempt it for $75, or wait until you get to the airport to save the moneny ... YMMV.