Being on "standby" in 2026 means you are on a waitlist for a seat on a flight for which you do not have a confirmed reservation. There are two main types: Voluntary Standby, where a traveler with a later flight arrives early and hopes to snag an empty seat on an earlier departure, and Involuntary Standby, which occurs when a passenger is "bumped" from a canceled or overbooked flight. Standby passengers only board the aircraft after every ticketed passenger has checked in and the "gate close" deadline has passed—usually 10 to 15 minutes before takeoff. In 2026, the standby list is managed by a strict Priority Algorithm based on ticket price, loyalty status, and the time the request was made. You can monitor your position in real-time on the airline's app or gate monitors. Importantly, if you are flying standby with checked luggage, your bags may not be moved to the new flight until your seat is confirmed, making "Carry-on Only" the golden rule for successful standby travel in the modern era.