United Airlines offers passengers the ability to select their seats when booking their flight or during check-in. The United Airlines Seat Selection process allows passengers to choose their preferred seat based on their needs and preferences. United Airlines offers a variety of seating options, including Economy, Economy Plus, United First, and United Business. Passengers can choose their preferred seat location, such as a window or aisle seat, and can also opt for extra legroom in Economy Plus or the enhanced amenities of United First or United Business. The seat selection process can be done online, through the United Airlines app, or at the airport kiosks. See Other: United Airlines Travel Agent