The DC-7 is an American aircraft built by Douglas Aircraft company in 1953 to 1958 and was the last major piston engine powered transport of Douglas.

The early DC-7s were only sold to US carriers. The extended range variant of the DC-7, the DC-7C "Seven Seas" was released by the Douglas Aircraft since European carriers could not take advantage of he small range increase in the early DC-7.

Pan American Airlines used the DC-7C aircraft to inaugurate the first non-stop New York-London service. Pan Am flew the DC-7Cs for only two and and a half years before entering the jet age. The DC-7 is the largest propeller transport aircraft that Pan Am has ever used. The DC-7C was also used by several other overseas airlines' fleets. In 1959, Douglas began converting DC-7A and DC-7C aircraft into DC-7F freighters, extending the life of the aircraft past its viability as a passenger transport.