A 50-minute connection at Charlotte Douglas International Airport (CLT) is considered a "legal" connection by American Airlines, but it is exceptionally tight and leaves almost no margin for error. Charlotte is a massive hub where gates are spread across five concourses (A through E). If your arriving flight is even 10 minutes late, or if you land at the far end of Concourse A and need to reach the regional gates in Concourse E, you will likely be running. Most airlines begin the boarding process 30 to 40 minutes before departure and close the jet bridge door 10 to 15 minutes before takeoff. This means that with a 50-minute window, you essentially have about 15 to 20 minutes to deplane and navigate the terminal. While the "Moving Walkways" help, the airport is often crowded, making a brisk walk difficult. For a stress-free experience, especially if you have checked luggage that also needs to be transferred, a connection of at least 75 to 90 minutes is much more advisable.