Korean Air has made a formal bid to buy a 44% stake in CSA Czech Airlines.
A spokeswoman for the SkyTeam alliance member confirms that a bid has been placed with the Czech government, but she was unable to say how much Korean Air could eventually pay for the stake in its fellow alliance member.
The Czech government, which owns 92% of CSA, started a tender process last year to sell a stake in the airline following an aborted attempt at privatisation in 2009.
At the time it launched the tender, Korean and Qatar Airways were identified as potential bidders, although in December 2012, Qatar's chief executive Akbar Al Baker appeared cool on the prospect of bidding for a stake in CSA.
Korean and CSA have an extensive codeshare relationship on services between Seoul, Prague and destinations in eastern Europe and northern Asia.
Flightglobal Pro data shows that CSA operates a fleet of 21 aircraft, comprising Airbus A320-family jets and ATR turboprops. It also has seven A320s on order.