By midday Monday, the dpa news agency reported 172 starts and landings of 593 planned had been canceled. Some 250 workers staged the so-called warning strike, a tactic used by German unions to increase pressure on employers.
The ver.di union seeks a roughly 30 percent pay increase this year for private security workers, including about 2,000 airport security personnel and 32,000 others in the state of North Rhine-Westphalia. Employers have offered a 9 percent raise.
Ver.di has staged regular strikes this year at the state's Cologne-Bonn and Duesseldorf airports as well as in Hamburg, where it's also seeking a new wage deal.