Regional Express (Rex) subsidiary Air Link will offer four return flights a week between Cobar and Dubbo with connections to Sydney from August 31 .

Under the new arrangement, all Air Link flights between Cobar and Dubbo will connect with Rex and Air Link services between Dubbo and Sydney.

The Cobar to Sydney via Dubbo fare would be fixed at $250, a Rex spokesperson said.

Cobar had been without a regular passenger service since December 2013 when previous operator Brindabella Airlines went into receivership.

Air Link previously operated flights in and out of Cobar and other western towns, but they were withdrawn in 2008. At the time, parent company Rex cited spiralling costs, workforce shortages and the impending axing of the federal government's en-route rebate.

A Rex spokesperson confirmed CSA Mine had "given a commitment of an agreed level of patronage that will support the service", effectively underwriting some of the seats.

Asked why the company thought its service would succeed where the Brindabella service had not, the spokesperson said: "Brindabella operated direct Cobar-Sydney services whereas Air Link will be leveraging from existing Sydney-Dubbo operations to maximise operating efficiencies".

Air Link CEO David Brooksby said the CSA Mine's support was a factor in getting the new regular service off the ground.

"I would like to thank CSA Mine for their proactive approach, which has been integral in re-establishing regular public transport services which will bring enormous socio-economic benefit to Cobar and the surrounding region," he said.

CSA Mine's CEO Deon Van Der Mescht said affordable flight services were important for the mine and good news for its people, their families and the broader community.

Cobar mayor Lilliane Brady said council was asked to consider waiving landing fees for the airline's new service, but council did not plan to do that, nor had it underwritten seats.

"I said definitely not, I can't let our ordinary pensioners and people on low incomes support what will mainly be a mining service," she said.

Having said that, Cr Brady urged Cobar residents to patronise the new service where possible.

"Use it or lose it," she said.

Cr Brady said she had no doubt Mr Van Der Mescht's efforts on behalf of CSA Mine were a major driving force that had helped secure the new service.

"He has really fought very hard to get this service here, and without him I don't think we would ever have got it," she said.

"I was always annoying him about it and he was constantly dealing with them to get this service. And I know the mines use charter flights at the moment, so this should work out well for them too."

Cr Brady said Cobar could also benefit if the new service made it easier for medical specialists to provide outreach services.

"I have heard one local medical centre is looking at closing for a day and bringing up specialists so that could be a good thing for the community," she said.