Zonguldak (ONQ) is a smaller airport in Turkey. You can fly to 2 destinations with 1 airline in scheduled passenger traffic.
The most frequently departed route is the route to Dusseldorf (DUS) in Germany with an average of 1 flights from Zonguldak every week which is over 96% of all weekly departures. There are no domestic flights scheduled for departing from Zonguldak (ONQ) as far as we know.
The only airline operating here is Germania using the Airbus A31X/32X.
The route with the longest flighttime from Zonguldak (ONQ) is to Muenster (FMO) and takes about 3h 35min with a Airbus A319