A 37-minute layover at Charlotte Douglas International Airport (CLT) is technically possible but extremely risky. American Airlines, which uses CLT as a major hub, considers 30 minutes to be the "Minimum Connection Time" for domestic-to-domestic flights. However, this leaves zero margin for error. If your inbound flight lands 10 minutes late or sits on the taxiway waiting for a gate, you will almost certainly miss your connection, as boarding for the next flight typically closes 10–15 minutes before departure. CLT is a relatively compact hub, but walking from the end of Concourse E (regional jets) to Concourse B can take a brisk 15 minutes through heavy crowds. In 2026, travelers on Reddit and travel forums frequently warn against these "legal" but stressful connections. If you have checked bags, the risk of them not making the transfer is also high. Unless you are a fast walker with nerves of steel and no checked luggage, it is much safer to book a layover of at least 60 to 90 minutes.