Yes, you can switch your American Airlines flight, but the cost and process depend on your fare type and your status. As of early 2026, most Main Cabin and higher tickets no longer carry a "change fee" for domestic or short-haul international flights. You simply pay the difference in the fare if the new flight is more expensive. If the new flight is cheaper, American will often issue you a "Trip Credit" for the difference. However, if you purchased a Basic Economy ticket, your options are extremely limited; you generally cannot change these flights after the initial 24-hour booking window unless you have a high-tier AAdvantage status or a specific travel protection plan. To make a switch, you can use the American Airlines app's "Manage Trips" section or the website. If you are already at the airport, you can also request a Same-Day Confirmed Change for a flat fee (usually $75) or "Same-Day Standby" for free, provided there is a seat available on an earlier or later flight on the same day.