Please be aware that Istanbul has multiple airports and that these results are for all airports serving the city.
The best month to arrive at Istanbul is November and the most expensive month to fly is August. (Average prices, based on 3186 datapoints.)
The best day to arrive at Istanbul is Tuesday and it would be best to avoid Friday, as prices are on average 29% higher than on Tuesday. (Average prices, based on 3171 datapoints.)
The cheapest airline flying to Istanbul is Pegasus Airlines. They are 58% cheaper than Lufthansa. (Average prices, based on 3524 datapoints.)
At Istanbul the most flights depart around 09:00. (Hourly flights, based on 3989 datapoints.)
From Istanbul it is on average the cheapest to fly to Ankara and to Antalya. (Average prices, based on 170 datapoints.)
From Istanbul most of the flights depart to Ankara, second best connected from Istanbul is Jeddah. (Daily flights, based on 147 datapoints.)