If you miss your connecting flight, your checked bag's fate depends on why you missed it and how the airline's "Baggage Reconciliation System" (BRS) reacts. If the delay was the airline's fault (e.g., a mechanical issue), the airline will usually "short-check" the bag or automatically re-tag it to your new confirmed flight. In 2026, most major airlines use RFID tracking, so you can see your bag's real-time location in the mobile app. If your bag makes the flight but you don't, it is often pulled off the plane for security reasons (Positive Passenger Bag Match), especially on international routes. If it does arrive at your final destination without you, the airline will hold it in a secure baggage office until you arrive. However, if you miss the flight due to your own delay (like sleeping through a gate change), your bag may continue to the destination, and you will need to speak with a "Baggage Service Office" agent to arrange for it to be held or sent back. Always check your app first to see if your "luggage journey" has been updated to match your new itinerary.