Which airline uses the code NK?

The airline that uses the code NK is Spirit Airlines. Each airline is assigned a unique two-letter airline code by the International Air Transport Association (IATA) for tracking and identification purposes. Spirit Airlines, known for its low-cost model and wide network of domestic and international flights, has established its brand with the NK code, which is recognized in the aviation industry. This code plays a vital role in reservations, ticketing, and baggage handling, ensuring that services related to the airline are efficiently managed.

In contrast, the other airlines have different IATA codes: Frontier Airlines is assigned the code F9, Horizon Air uses QX, and Hawaiian Airlines is designated as HA. Each of these airlines, while distinct in their services and routes, does not utilize the NK code, which is solely associated with Spirit Airlines.