Air Berlin confirms that it intends to chase compensation over the delayed opening to the German capital's Brandenburg airport.
It is in discussions over reparations but the airline has yet to reach any agreement on the scale or mechanism.
Chief executive Hartmut Mehdorn says the postponement to March 2013, just a few weeks before the planned opening this month, has caused "added inconvenience and expense".
He says that the airline will seek some form of compensation but adds: "Our first priority is to take care of the customers."
Air Berlin had been intending to introduce a new schedule tailored to Brandenburg but has been forced to revert to its main Tegel base until the end of the winter season.