It said the airlines in operation are Aero Contractors, Arik Air, Air Peace, Azman Air, Dana Air, Med-View, Overland, Max Air and Ibom Air.
Air Peace, a domestic airline, topped the chart of delayed and cancelled flights between January and June, a report by the Consumer Protection Department of the Nigerian Civil Aviation Authority (NCAA) says.
The document said Air Peace, which operated 11,889 flights, topped the chart of delayed flights with 6,359 and 91 cancelled flights.
It added that Arik Air followed with 2,306 delayed flights and 41 cancellations out of its 5,378 flight operations.
According to the document, Aero operated 3,293 flights with 2,181 delayed and 36 cancelled flights while Azman Air recorded 1,312 delayed and 12 cancellations out of the 2,711 flights operated by the airline.
Also, Dana Air operated 2,278 flights with 1,477 delayed and 25 cancellations while Overland had 1,248 flights with 894 delayed and eight cancellations.
Max Air recorded 2,652 flights with 1,538 delayed and 19 cancellations; Medview, 374 flights with 219 delayed and eight cancelled flights and new entrant, Ibom Air had 220 flights with 143 delayed and no cancelled flight.
However, the delays according to the airlines, were due to operational reasons, scarcity of aviation fuel as well as adverse weather conditions leading to low visibility at most of the airports.