Why is there no demand for international flights for the USSR?

[vokdalg]

In reality, after all, the Soviet Aeroflot flew even to the United States, not to mention the friendly countries of the socialist bloc

[Sami]

Yes there is, from Moscow (SVO) at least, check that out.

[vokdalg]

Thank You for the tip.
Maybe the problem was that I had tried from Domodedovo Moscow.

[NZelenkova]

Domodedovo during the existence of the USSR is a purely domestic hub. International flights might start opening up after 1992 but you will also lose formerly domestic routes to newly independent countries.