QantasLink will launch flights from Sydney to a new $100 million-plus privately constructed airport at Toowoomba, Queensland from mid-November, in a move that demonstrates the Wagner family's unusual development could pay off.

The regional arm of Qantas Airways will offer 11 return flights a week to and from Brisbane West Wellcamp Airport, which is located about a two-hour drive west of Brisbane.

The Wagner family has an estimated wealth of $827 million, up from $540 million last year. Credit:Jarrayd Apelt

The airport is Australia's first privately-funded public airport and the first public airport to be built in 50 years. The Wagner family behind it is on the BRW Rich List, with an estimated wealth of $827 million, up from $540 million last year.

John Wagner, the chairman of unlisted construction materials and mining services group Wagners and himself a pilot, has been looking to sign up airlines to serve the airport for the last year after spending "a couple of hundred million" dollars on the facility and adjacent business park.