Cobham Aviation Services Australia (formerly National Jet Systems), is a scheduled and charter airline with its Headquarters based in Adelaide, Australia. It provides aviation services including wet leasing, scheduled airline operations, and charter services across Australia. Cobham conducts passenger and freight operations on behalf of clients such as Qantas, Australian air Express and Santos. Cobham provides mining and resource companies Fly In/Fly Out (FIFO) services across remote Australia. Its main base is Adelaide International Airport, with hubs at Cairns International Airport, Darwin International Airport and Perth Airport. It is a major contractor for QantasLink.