The Australian Competition and Consumer Commission (ACCC) has won a case in the Brisbane Federal Court against Flight Centre over price fixing.

The court today found Flight Centre guilty of six charges of attempting to induce competitors to enter into price-fixing arrangements.

The charges relate to attempts to induce three major airlines to agree to stop directly offering and booking their own international fares at prices less than what Flight Centre offered.

The attempts occurred between 2005 and 2009 and involved Singapore Airlines, Malaysian Airlines and Emirates.

In today's judgment, Justice Logan included a number of emails between Flight Centre and the three airlines.

One of the emails, sent to Singapore Airlines in 2006, refers to a preferred agreement with the airline.

"Last year, there were many instances where SQ (Singapore Airlines) either undercut or allowed us an insignificant margin," the email said.

"These reduced margins this year have made it difficult at times for us to push the agreement from a head office perspective and recognition of this issue will help us to achieve our collective goals."

The judgment then went on to say the intent behind the email was clear.

"Read on context, the words emphasised in the email of March 17, 2006 do not just constitute a request for access to such fares but also an endeavour to persuade Singapore Airlines to stop the practice of undercutting and thus to maintain Flight Centre's margin," the judgement said.

"I consider this purpose is naked on the face of this email."

In a statement to the Australian Securities Exchange, Flight Centre says it is disappointed with the judgment.

Managing director Graham Turner says the company was surprised by the decision and would consider an appeal.

"As an agent that provides considerable free advice and help to the travelling public, FLT (Flight Centre) asks for adequate commissions from suppliers and also reasonable access to all deals that they release to the market," Mr Turner said.

"Having access to all offers is a logical and natural business request for an agent to make to ensure the customers it serves are not disadvantaged.

"Today's ruling is likely to have implications for the travel industry and for many retailers and agents in other sectors."

A penalty hearing is set down for December 19.