It covers the entire time on a typical commercial flight including take-off and landing. Bundle your flight + hotel and save! Prices and availability are subject to change. Flight times from MEM to Denver International Airport (DEN) are usually around two hours. Book one-way Delta flights from Memphis MEM to Denver DEN. Find cheap fares from Memphis, TN (MEM) to Denver, CO (DEN) with Frontier Airlines. This is the average non-stop flight time based upon historical flights for this route. JACKSONVILLE, Fla. - knows exactly what will set out to do, and he won't make it easy for him. This is the average non-stop flight time based upon historical flights for this route. Between these two airlines, you'll be able to find a good deal from Memphis to Denver.