In 1938 entered service the faster Savoia-Marchetti SM-75 with greater autonomy, capable of carrying a nearly 5000 kg load of mail and up to twenty-four passengers. This aircraft was used from the beginning of 1939 and made it possible -thanks to improved flight authonomy and top speed of 370kmh- to eliminate the change of aircraft, to reduce the number of stopovers and to shorten the travel time of a full day.