Which airline, that flew only with foreign models, is the largest airline of the Russian Federation?
Tupolev ANT-9:  At this time Deruluft, one of the forerunners of Aeroflot, flew only with foreign models, which were mainly German or Dutch. Aeroflot: PJSC AeroflotRussian Airlines (Russian: ПАО "Аэрофло́т-Росси́йские авиали́нии" , "ПAO Aeroflot-Rossiyskiye avialinii" ) (), commonly known as Aeroflot ( or ) (Russian: Аэрофлот , English translation: "air fleet", ] ), is the flag carrier and largest airline of the Russian Federation.
Aeroflot