List down all the airlines and now it comes to the point to check each airlines websites one by one. They may have special promotions and you can view the prices clearly for the flexible travel days.

I have bought my ticket to Turkey from Pegasus as they have started their operations in June and it is one of the cheap flight tickets I have purchased. In the meantime do not forget to check competitor airlines as Turkish Airlines. They will compete with these prices and as of today you will see that they have reduced their prices and started a campaign with certain terms conditions and you can fly %50 cheaper than before.