The RAF left the station in 1964, but the aerodrome was reopened in 1966 as a civil airport. The airfield was named Teesside International Airport in the 1960s, and was renamed Durham Tees Valley Airport in 2004. In 1986 the entire former RAF Middleton St George NCO Married Quarter housing estate was sold to The Welbeck Estate Group. It was renamed The Virginia Estate as Welbeck at the time were involved in 370 apartments in Arlington Virginia opposite the military facility at the Pentagon, USA.
From 1968 to 1979, some of the former station buildings housed Middleton St George College of Education, a teacher training college.