Go through your results for flights to Mardin in Turkey with Netflights. The most popular airlines for this route are Turkish Airlines, with Turkish Airlines claiming the top spot.
Flexible on dates? Conducting your search by month allows you to compare prices to Mardin throughout the year. Accommodation prices will also be higher at this time of year.
So, if the flights to Mardin don't work for you, you could always try searching for flights to other airports in Turkey.
Looking at a few different departure airports will give you even more choice. See what you can find. And remember, it's best to book your flights in advance wherever possible.