If American Airlines cancels your flight, you are entitled to certain rights and compensation depending on the circumstances of the cancellation. In most cases, the airline will offer you a few options to minimize disruption to your travel plans. The primary option is rebooking. American Airlines must offer to rebook you on the next available flight to your destination at no extra cost. This could be a later flight on the same day, the following day, or even with a partner airline if needed to get you to your destination as soon as possible.

If the cancellation causes you to be stranded for several hours or overnight and the reason is within the airline's control, such as maintenance issues or staffing shortages, you may be eligible for additional support. This can include meal vouchers, hotel accommodations, and ground transportation between the hotel and the airport. These services are typically provided when the delay is long and the disruption is not caused by weather or other uncontrollable factors.

In the event you choose not to travel due to the cancellation, you are entitled to a full refund, even if your ticket was non-refundable. This refund should also cover any unused add-ons or fees for services you didn’t receive. American Airlines is required to process this refund in a timely manner. This applies regardless of the cause of the cancellation, as long as the airline is unable to complete the flight as scheduled.

If your canceled flight is part of international travel, you may also have additional protections under international agreements like the Montreal Convention. These may entitle you to compensation or reimbursement for expenses, depending on the duration of the delay and the cause. While regulations may vary by country, American Airlines generally complies with both U.S. and international aviation rules to protect passengers' rights.

In conclusion, when American Airlines cancels your flight, you are typically entitled to free rebooking, refunds for unused services, and possibly meals and accommodations depending on the situation. Being aware of your rights can help you respond confidently and quickly to any disruptions in your travel schedule. Always keep your flight documents and communicate clearly with airline representatives to ensure you receive all compensation and services you’re eligible for.