With the outbreak of World War II, and the Italian invasion in October 1940, most civilian pilots were mustered into the Royal Hellenic Air Force.

As soon as Greece began re-building its infrastructure after the end of World War II, Zotos, freshly out of service in the Air Force, looked to re-establish the airline.

These aircraft, registered as SX-BAA, SX-BAB and SX-BAC began service on July 30, 1946, from the newly established Athens Hellenikon Airport south-east of the city on the Saronic Gulf.

[1] The airline also operated as the sole Greek-flagged carrier in this period, and as such, it flew the Greek delegation to the Paris Peace talks on October 4, 1946.

The aircraft, registered as SX-BAG, SX-BAH, and SX-BAI respectively, were christened at a celebration on August 31, 1947, attended by the new king, Paul.

However, there were limits to the numbers of domestic passengers that the still-shaky Greek market could produce, and all of the airlines were constantly in jeopardy of failing.

A month and a half later on June 6, while flying from Kavala–Athens, SX-BAI crashed on the north slope of Mount Parnitha killing all 18 passengers aboard.

Due to economic recession and improved road and shipping infrastructure, the number of passengers flown by all three airlines reached a plateau at 324,000 in 1949.

Technical and Aeronautical Holdings served a number of domestic destinations in Greece on an irregular basis in the period 1935-1941.