* Air France-KLM, Aeroflot, Odien, Unimex interested in CSA
* Winner to be known by the end of September
(Releads with finance ministry statement)
By Jana Mlcochova
PRAGUE, March 23 (Reuters) - The Czech Finance Ministry closed the first round of tendering in the Czech Airlines CSA privatisation on Monday with four preliminary bids received.
Air France-KLM <AIRF.PA>, Russia's Aeroflot <AFLT.MM>, private equity firm Odien and a consortium comprising Czech Unimex Group and Travel Service <ICEAIR.IC> all submitted applications in the tendering, the ministry said.
It also said the winner should be known by the end of September at the latest.
The Czech government is selling a 91.5 percent stake in the airline as a global economic slowdown has sapped travel demand, putting airlines under heavy pressure.
Analyst expect the sale of what is a relatively small European airline hit by leasing costs as well as the economic downturn to fetch up to 5 billion crowns ($255 million).
Aeroflot had announced earlier on Monday it had entered the tender competition while Air France-KLM said it would file a letter of interest in order to access the airline's data.
Bidders need to meet conditions such as keeping CSA's national identity status to prevent the airline losing any of its international routes outside Europe.
That could happen if the company is sold to a foreign buyer because of the global system of bilateral agreements between countries which govern which airlines can fly where around the world.
Non-Czech bidders will therefore have to combine with Czech entities in consortia to fulfil that condition.
Aeroflot said it planned to create a partnership with a Czech or a European company but did not specify which.
The government will also assess bidders' security risks with Czech politicians having voiced concerns about Aeroflot's ownership structure. Aeroflot has not commented on the matter.
The Russian carrier has long been on the lookout for acquisitions in Europe and Chief Executive Valery Okulov, son-in-law of Russia's first president, Boris Yeltsin, told Reuters in September last year the company was eyeing two possible acquisitions, including Czech Airlines.
Air France, which sees itself as a major player in European industry consolidation, said Czech Airlines' flight network was highly complementary to its own and would enable it to strengthen its position in central and eastern Europe.
Air France has described Czech Airlines as a close partner, particularly through their membership of the global SkyTeam alliance of airlines since 2001.
CSA made a pretax profit of $550,000 million in 2008 on operating revenue of 23.2 million Czech crowns.
Management ended three years of losses in 2007 after cutting costs and boosting revenue by selling off non-core assets, including its catering division, and by selling and leasing back planes. ($1=19.64 Czech crowns) (Editing by Dan Lalor, Greg Mahlich)