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 May and the most expensive month to fly is December. (Average prices, based on 2807 datapoints.)
The best day to arrive at Istanbul is Tuesday and it would be best to avoid Friday, as prices are on average 80.55% higher than on Tuesday. (Average prices, based on 267 datapoints.)
The cheapest airline flying to Istanbul is Pegasus Airlines. They are 83% cheaper than Emirates. (Average prices, based on 3042 datapoints.)
At Istanbul the most flights depart around 10:00. (Hourly flights, based on 3541 datapoints.)
From Istanbul it is on average the cheapest to fly to Antalya and to Dusseldorf. (Average prices, based on 180 datapoints.)
From Istanbul most of the flights depart to Antalya, second best connected from Istanbul is London. (Daily flights, based on 201 datapoints.)