Seeing "Standby" on your boarding pass typically means you do not have a confirmed seat assignment for that specific flight at the moment of check-in. This often happens if the flight is overbooked and the airline is waiting for "no-shows" to see how many seats are actually available. It can also occur if you are an airline employee traveling on a "buddy pass," or if you have requested a same-day flight change to an earlier departure. In some cases, it simply means the "basic economy" seats haven't been allocated yet, and you will receive your seat number at the gate. If you are on the standby list, you should stay near the gate area and listen for your name; gate agents usually begin clearing standby passengers about 15 to 30 minutes before departure. If you don't clear, the airline will typically roll you onto the standby list for the next available flight to your destination.
If your boarding pass says “standby,” it typically means that you do not have a confirmed seat on the flight and are waiting for a seat to become available. There are several reasons why this might happen:
Airlines sometimes oversell flights to account for no-shows. If more passengers show up than there are seats, some passengers may be placed on standby.
If you missed your original flight or a connecting flight, the airline might rebook you on standby for the next available flight.
Some tickets (e.g., discounted or non-revenue tickets) may only allow standby travel rather than confirmed seating.
If your original flight was canceled, delayed, or changed, the airline might assign you a standby status on the next available flight.
If you’re unsure why you’re on standby, contact the airline or check your booking details for more information.