The design, developed by a team led by Don Palmer, was a scaled-up version of the original Model 10 Electra, with passenger seating increased from 10 to 14.

The Model 14 was the basis for development of the Lockheed Hudson maritime reconnaissance and light bomber aircraft operated by the Royal Air Force, USAAF, United States Navy and many others during World War II.

[citation needed] In 1938, British prime minister Neville Chamberlain, after signing the Munich Agreement, returned to London Heston Airport on board a British Airways Lockheed 14, and was famously photographed beside the aircraft (registration G-AFGN[2]),[3] showing to the crowd the signed document, which he would later that day describe as bringing "peace for our time".

[citation needed] In May 1938, a team of aviators of the Polish airline LOT, made up of Wacław Makowski, director of LOT and first pilot, Zbigniew Wysiekierski, second pilot, Szymon Piskorz, mechanic and radionavigator, Alfons Rzeczewski, radio-navigator and Jerzy Krassowski, assistant, accomplished an experimental flight from the United States to Poland.

The crew took off from Burbank (Los Angeles) where these aircraft were manufactured, and after a tour of South America, flew the Atlantic from Brazil to West Africa en route to Warsaw.

With four crewmates (Harry Connor, copilot; Tom Thurlow, navigator; Richard Stoddart, engineer; and Ed Lund, mechanic), the Lockheed 14 took off from Floyd Bennett Field in New York on July 10, 1938.

The flight, which circled the narrower northern latitudes, passed through Paris, Moscow, Omsk, Yakutsk, Fairbanks, Alaska and Minneapolis before returning to New York.