Turkey and Iran were on opposite sides of the fence in Syria, but it seems that the picture is different in Lebanon, and the two are cooperating to strengthen Hezbollah.
After the fall of the Assad regime, Syrian airspace was closed to Iranian aircraft, but the Turks came to their aid.
According to commercial flight data, between September 13 and the end of last year, the Iranian airline "Mahan Air", which is affiliated with the Revolutionary Guards, made 11 flights to Beirut using Turkish airspace. In the past, it was alleged that this airline was involved, among other things, in smuggling weapons and money to Hezbollah.
According to the Arab Center for the Study of Extremism, the continued flights of Mahan Air through Turkey indicate a level of cooperation between the Turkish government and Iran's Revolutionary Guards.