Australia's federal politicians have labelled Perth's domestic airport the worst in Australia.

Some, like Forrest MHR Geoff Prosser, have compared the airport with a Third World facility.

Despite the fact that domestic passenger numbers have doubled in the past five years, services haven't improved enough, politicians say.

Mr Prosser, Canning's Don Randall and O'Connor MP Wilson Tuckey have complained of huge queues, long waiting times for luggage, lack of parking space and outdated facilities.

And while airport owner Westralia Airports Corporation says improvements are planned, the politicians say the facility needs action now.

Mr Tuckey said: "We used to laugh at South Australia - we used to call them the backward state. Now it's us."

"There are people having to queue from outside to get in. Parking is all over the place because there aren't enough spaces."

Mr Prosser said he had raised the matter with Australia's Transport and Regional Services Minister Mark Vaile in the Coalition's joint parties meeting about two months ago.

Mr Prosser said that standards had deteriorated under the watch of WAC.

"Adelaide airport used to be ridiculed as being the worst in Australia, having what amounted to Third World facilities," he said.

"Unfortunately, Perth has now got this title."

Mr Prosser is concerned about a lack of investment at Perth airport and asked the Australian Government to hold urgent talks with the owner to ensure it was meeting its contractual obligations.

Specifically, he asked for more X-ray and scanning machines to improve the flow of passengers at the Qantas terminal.

He said parking was chaotic at both the domestic and international terminals.

Mr Prosser said there was a need to redevelop the Qantas terminal to allow more air-bridge connections to aircraft.

"Perth airport, with the high number of movements via Qantas and Jetstar particularly, both inter and intrastate, together with fly-in, fly-out movements at Perth domestic airport, is presently woefully inadequate," he said.

"And given the expected increase in passenger movements through Perth in the coming years, the planned airport upgrade needs to be urgently brought forward."

Mr Vaile said on August 17: "The Government believes that airport operators have sufficient incentive to invest in infrastructure that will meet the future aviation needs of airport users."

"The Australian Government expects Westralia Airports Corporation to provide the facilities commensurate with those expected at a major capital city."

Malcolm Bradshaw, general manager of corporate communications at Westralia Airports, said the future of both the domestic and international airports was being looked at and a decision was likely by the end of the year.

The two airports could possibly be amalgamated, he said.

In the meantime, 1300 extra parking bays would be made available.

Western Australia's Planning and Infrastructure Minister Alannah MacTiernan, described the domestic airport as diabolical and said a new one should be built alongside Perth international airport.