Please be aware that Istanbul has multiple airports and that these results are for all airports serving the city.
The best month to fly between Istanbul and Jeddah is September and the most expensive month to fly is August. (Average prices, based on 531 datapoints.)
The best day to arrive at Istanbul is Sunday and it would be best to avoid Monday, as prices are on average 50.6% higher than on Sunday. (Average prices, based on 301 datapoints.)
The cheapest airline flying from Istanbul to Jeddah is Nas Air. They are 34% cheaper than Saudi Arabian Airlines. (Average prices, based on 536 datapoints.)
The best time to fly is at around 0. (Average prices, based on 770 datapoints.)