Time To Exit
If your plane is either about to leave or it has just landed, you cannot be on that plane for longer than three hours. If you wish to get off, you are more than welcome after that time frame.
Flight attendants are also required to keep the food and water cart going up and down the aisle after two hours of delay. You’ll be fed for at least an hour, don’t worry. Just remember, don’t drink the coffee or tea!