It's not just the flight prices - I think we could see big hikes in hotel rates next year with the weak lira, inflation and the massive increases in fuel /electricity prices that directly affect everything - manufacturing, transportation etc.
Traditionally (at least in the last 10-15 years) flight prices were higher than relatively comparable destinations - Greek Islands, Cyprus etc - but accommodation prices were so cheap they offset that. With high flight prices and potentially high accommodation costs it will be interesting to see how tourism fares in 2020.