A 45-minute layover at Hamad International Airport (DOH) in Doha is considered a "Minimum Connection Time" (MCT) and is technically possible, but it is extremely tight. Qatar Airways is remarkably efficient at managing these "short-shifters," often providing a representative to meet passengers at the gate and fast-track them through security to the next flight. In 2026, the airport remains a top-tier global hub, yet the sheer size of the terminal (and the walk to the "D" or "E" gates) means a 45-minute window leaves no room for your inbound flight to be even five minutes late. If you are on a single ticket with Qatar Airways, they will rebook you for free if you miss it, but if you are booking "self-transfers" with separate airlines, 45 minutes is virtually impossible and highly discouraged.