FRANKFURT (Reuters) - German airline Lufthansa
The strikes by apron staff, who guide planes in and out of parking positions at the airport, resulted in the cancellation of around 1,800 flights, costing Lufthansa tens of millions of euros in lost revenue and leading Fraport to cut its guidance for passenger number growth.
The two companies said they had filed a complaint with a court in Frankfurt last week, but declined to give the amount of damages being demanded.
German magazine Spiegel, which said the German air traffic controllers' authority DFS and airlines Air Berlin
Condor, DFS and Air Berlin were not immediately available for comment.
The legal action comes after Lufthansa, Air Berlin and Ryanair
($1 = 0.8132 euros)
(Reporting by Victoria Bryan; Editing by Susan Fenton)