If your bag arrives open, unlocked or visibly broken, examine instantly to see if any of the contents are missing or broken. When you deplane from your first flight, check the monitor or schedule board at the connecting airport to ensure the gate assignment for your subsequent flight hasn’t changed. This rule applies to departures and arrivals, and to U.S. and overseas airlines that operate a minimum of one aircraft with 30 or more seats. If you find a flight on another airline, ask the primary airline to “endorse” your ticket to the new provider, which may save you a fare enhance. However, there is no rule requiring an airline to do that.