Planning a trip with American Airlines and looking to fly in a better seat than you've booked but do not have any information on selecting a seat with AA, well, to pick your seat on American Airlines, select your preferred seat during booking or manage your reservation online via the American Airlines official website or app. Also, some seat selections may require an additional fee, although you can also select seats during check-in, subject to availability. To learn more about American Airlines seat selection, visit the official website or go through the mentioned link.