The best month to fly between Izmir and Istanbul is June and the most expensive month to fly is May. (Average prices, based on 205 datapoints.)
The best day to arrive at Izmir is Wednesday and it would be best to avoid Tuesday, as prices are on average 183.92% higher than on Wednesday. (Average prices, based on 205 datapoints.)
The best time to fly is at around 20. (Average prices, based on 335 datapoints.)