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 1616 datapoints.)
The best day to arrive at Istanbul is Monday and it would be best to avoid Friday, as prices are on average 32.42% higher than on Monday. (Average prices, based on 4353 datapoints.)
The cheapest airline flying to Istanbul is Aegean Airlines. They are 61% cheaper than Egyptair. (Average prices, based on 1791 datapoints.)
At Istanbul the most flights depart around 10:00. (Hourly flights, based on 1997 datapoints.)
From Istanbul it is on average the cheapest to fly to Ankara and to Antalya. (Average prices, based on 1511 datapoints.)
From Istanbul most of the flights depart to Ankara, second best connected from Istanbul is Jeddah. (Daily flights, based on 119 datapoints.)