It depends on the direction of travel and the country. If you are arriving in the U.S. from an international destination (e.g., London to Dallas to Austin), you must collect your bags after clearing Immigration, walk them through Customs, and then place them on the "Baggage Re-check" belt. This is a federal requirement regardless of the airline. However, if you are departing the U.S. for an international destination (e.g., Austin to Dallas to London), American Airlines will usually "check through" your bags to your final destination, and you do not need to touch them during your connection. In 2026, "Pre-clearance" airports (like Dublin or Nassau) allow you to clear U.S. Customs before you fly, meaning you can also skip the re-check process upon landing. Always look at your bag tag at the initial check-in; if it shows your final destination code, it's a "through-check" unless local customs laws dictate otherwise.