Whether you can keep American Airlines headphones depends entirely on the type of headphone and the cabin you are flying in. If you are in Main Cabin (Economy) on a domestic or international flight and receive a pair of small, plastic "in-ear" earbuds (often provided in a small plastic bag), these are yours to keep. They are inexpensive, disposable items that the airline does not reuse for hygiene reasons. However, if you are flying in Flagship First or Business Class, you will likely be provided with high-quality, "over-ear" Bang & Olufsen or Bose noise-canceling headphones. These are strictly the property of American Airlines and are collected by the flight attendants about 30 to 45 minutes before landing. These premium headphones are cleaned, fitted with new ear pads, and repackaged for the next flight. If you accidentally take these, you may be charged a significant replacement fee, as they are high-end electronic equipment worth hundreds of dollars.