When you purchase a connecting flight, checked baggage is usually forwarded to your final destination, and will change planes when you do. The agent at check-in will usually ask if you want your luggage checked through to your last stop.

The most reliable way to know if your luggage is checked through to your final destination is to examine the baggage tag printed and attached to your suitcase at the check-in counter. This tag features a series of three-letter airport codes; the code at the very bottom represents the final stop for that bag. If you see your final destination code there, the bag is "checked through." Furthermore, the gate agent or kiosk attendant will usually verbally confirm this, and your baggage claim receipt (the small sticker often placed on the back of your passport or boarding pass) will also list the final destination. In 2026, many major airlines like Delta, United, and American also provide real-time bag tracking in their mobile apps, allowing you to see exactly when your bag is scanned onto each connecting flight. However, keep in mind that if you are transferring from an international flight to a domestic one in countries like the U.S., you must almost always collect your bag for customs and re-check it, even if the tag says it’s going to the final city.