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 4194 datapoints.)
The best day to arrive at Istanbul is Monday and it would be best to avoid Friday, as prices are on average 25.38% higher than on Monday. (Average prices, based on 4570 datapoints.)
The cheapest airline flying to Istanbul is Pegasus Airlines. They are 63% cheaper than Ethiopian Airlines. (Average prices, based on 4314 datapoints.)
At Istanbul the most flights depart around 10:00. (Hourly flights, based on 4493 datapoints.)
From Istanbul it is on average the cheapest to fly to Ankara and to Antalya. (Average prices, based on 1113 datapoints.)
From Istanbul most of the flights depart to Ankara, second best connected from Istanbul is Amsterdam. (Daily flights, based on 104 datapoints.)