I'm in need of some help. I have been trying to find one way flight to Dalaman for February and I've not had the best of luck

I've tried everywhere, and I mean everywhere but the cheapest price I have found for a one way to Dalaman is just under £500 and has two stops at Istanbul and Amsterdam.
Has anybody ever come across a website that has winter flights that aren't ridiculously pricey? I'm not too fussed about a stop-off, I just need to find a flight ASAP. Any help is appreciated.
Rebecca.