Zonguldak Çaycuma Airport — Zonguldak, Turkey

ONQ is Zonguldak Çaycuma Airport, serving Zonguldak, a city on Turkey's Black Sea coast historically known as the center of Turkey's coal mining industry. The airport is located in the Çaycuma district, some distance from Zonguldak city itself, and provides domestic flights connecting the region to Istanbul and other major Turkish cities. Zonguldak's coal mining heritage shaped much of its industrial development, and ONQ has helped diversify transportation options for a region that also includes forested hills and Black Sea fishing communities. Given the mountainous terrain along Turkey's northern coast, air travel through ONQ offers a faster alternative to lengthy road journeys from Istanbul or Ankara.