Badgerys Creek has been earmarked as the site for Sydney’s second airport.

Anyone who has had to wait in line at Sydney Airport may appreciate industry calls for a second gateway to Australia's busiest hub.

Almost 20 airlines, investors and industry consultants rejected the NSW government’s claims that Kingsford Smith Airport can continue to meet the burgeoning aviation demand, the Australian Financial Review reported.

A consortium of industry officials met with the federal Department of Transport and Infrastructure in November to discuss and assess the viability of a second Sydney airport at Wilton.

The site at Wilton, in Sydney’s south-west was deemed to be the least preferable option. Interested parties have suggested Badgerys Creek in Sydney’s west as their preferred construction site.

The NSW government proposed short term plans to boost access at Sydney Airport including the under-passing of a rail freight line, one way road systems on the airport approach and widening Mill Pond Road.

“The NSW Government has taken a responsible approach to efficiently use the existing infrastructure before spending scarce state and federal capital on a new airport, consistent with the recommendations of the recent Joint Study into Aviation Capacity in the Sydney Region,” Sydney Airport chief executive Kerrie Mather said.

“These additional operating flexibilities will give Sydney Airport the added capabilities to cope with the expected increase in demand for air travel in the years ahead,” Tourism Industry Council NSW general manager Andrew Jefferies.

The Federal government may now be forced to make a political u-turn and alter its preference for a second airport at Wilton in favour of the heavily-backed Badgerys Creek plan.