The Turkish leader was visiting the Teknofest air show on Saturday at Istanbul's old Atatürk airport, an event that showcases the military's drones and aircraft.
Erdogan has governed the country for two decades. He is seeking a third presidential term in Turkey's 14 May elections. The head of state is due to take part in an election rally in Izmir, on the west coast, later Saturday, according to his official programme.
He is also expected in the capital Ankara on Sunday, exactly two weeks before the first round of voting, to resume his election campaign after a four-day break this week.