The minimum age to begin pilot training is typically 17 for a Private Pilot License (PPL) and 18 for a Commercial Pilot License (CPL). Most aspiring airline pilots start their professional training in their late teens or early twenties. However, you cannot fly for a major airline as a First Officer until you hold an Airline Transport Pilot License (ATPL), which usually requires a minimum age of 21 in the U.S. and Europe. In 2026, many airlines are aggressively recruiting through "Cadet Programs" that target high school graduates aged 18-25, providing a direct path to the cockpit. While you can start late—even into your 40s—most career pilots aim to be "line released" by age 23 or 24 to maximize their seniority and earning potential before the mandatory retirement age, which is currently 65 in most jurisdictions (though some regions are considering raising it to 67).