The West Australian Liberal MP Don Randall has announced he will repay the travel expenses he claimed for a trip to Cairns last year.

Mr Randall has come under scrutiny for spending taxpayers' money on travel to the Far North Queensland town with his wife in November on what he said was "electorate business".

A week later, he disclosed that he'd taken possession of an investment property in Cairns.

The cost of the airfares and travel allowance was more than $5,000.

Mr Randall has issued a statement saying that as the Finance Department cannot provide him with definitive advice about the claim, he has decided to repay the costs to ensure the right thing is done by the taxpayer.

However, an earlier statement released by Mr Randall said the travel claims were appropriately acquitted with the Department of Finance.

Meanwhile, taxpayers also paid for the Coalition MP and his wife to fly from Perth to Melbourne on Saturday September 15 last year at a cost of $5,203, for what a Department of Finance document says was "sittings of Parliament".

Parliament sat last year the week before that date and resumed on Monday September 17.

That Saturday night, the West Coast Eagles faced Collingwood in Melbourne in an AFL semi-final.

Liberal MP Rob Johnson says the situation is deplorable and Mr Randall should face consequences.

"He should either resign from Parliament and do the honourable thing, or Tony Abbott should show leadership I think here and sack him," he said.

"For him to be on the privileges committee, which oversees standards of members of Parliament, is the height of hypocrisy. Don Randall should go."

Mr Johnson's comments are the latest slings in a long-standing stoush between the pair.

Mr Randall created headlines last year when he stood up in Parliament and launched a tirade against the then WA police minister, calling him a "bumbling embarrassment".

Today, Mr Johnson said he was glad his colleague had come under fire.

"He hasn't got the guts to talk to [the media] and explain why he has used taxpayers funds to go over to Queensland and indeed to Melbourne for what would appear to be for his own personal benefit.

"That to me is totally wrong.

"I always say what goes around, comes around and it couldn't happen to a nicer person," he said tongue-in-cheek.

"I think when you behave badly, it'll come back and bite you one day and that's what happening now.

"He deserves every minute of it."