Please be aware that Istanbul has multiple airports and that these results are only for Istanbul Atatürk Airport.
The best month to arrive at Istanbul is November and the most expensive month to fly is August. (Average prices, based on 3966 datapoints.)
The best day to arrive at Istanbul is Tuesday and it would be best to avoid Friday, as prices are on average 22.26% higher than on Tuesday. (Average prices, based on 1891 datapoints.)
The cheapest airline flying to Istanbul is Pegasus Airlines. They are 92% cheaper than Qatar Airways. (Average prices, based on 4062 datapoints.)
At Istanbul the most flights depart around 18:00. (Hourly flights, based on 4165 datapoints.)
From Istanbul it is on average the cheapest to fly to Frankfurt and to Dusseldorf. (Average prices, based on 1514 datapoints.)
From Istanbul most of the flights depart to London, second best connected from Istanbul is Cairo. (Daily flights, based on 70 datapoints.)