Missed your connection? First, open the airline app - you have likely already been rebooked, and that is the flight to beat. Then get in the agent line and call the airline at the same time, and name a specific alternative flight. The best seats go in the first 20 minutes.
Your inbound was late and the connecting flight left without you. Your job in the next ten minutes: find out what the airline put you on, then beat it.
Do several things at once. Get in the line, and call the airline, and open the app - whichever connects first wins. Standing in one line doing nothing else is how travelers lose four hours and every good seat.
Facts reviewed August 2026. General guidance, not legal advice.