Whether or not you can************* after canceling an American Airlines ticket depends on the type of ticket you have. Refundable tickets allow for cancellations at any time with a full refund, while non-refundable tickets typically come with a cancellation fee. In the case of non-refundable tickets, you’ll likely receive a travel credit rather than a monetary refund.
To cancel your flight, simply visit the American Airlines website, enter your booking reference in the "My Trips" section, and follow the instructions. The airline also allows for cancellation through their customer service, though online cancellations tend to be faster and more efficient.