(FILES) In this file photo taken on June 25, 2020 Aircrafts of German airline Lufthansa stand at the airport in Frankfurt am Main, western Germany, on June 25, 2020. - German national carrier Lufthansa said it would have to cancel almost all flights at its domestic hubs in Frankfurt and Munich on July 27, 2022 because of a planned strike by ground crew, adding to a summer of travel chaos across Europe. The one-day walkout called by Germany's powerful Verdi union will have a "massive impact", Lufthansa said in a statement on July 26. (Photo by Daniel ROLAND / AFP)

With a warning strike by the ground staff, the Verdi union wants to increase the pressure in the ongoing wage negotiations with Lufthansa. The strike, which is supposed to last from Wednesday (3.45 a.m.) to Thursday, 6 a.m., hits passengers hard: Lufthansa canceled more than 1000 flights at the Frankfurt and Munich hubs in the middle of the holiday season and fears the effects until Friday, the last day of school before the summer holidays in Bavaria.

134,000 passengers had to change or abandon their travel plans. At least 47 connections had already failed on Tuesday. According to Verdi, various Lufthansa companies at the hubs in Frankfurt and Munich as well as in Düsseldorf, Hamburg, Berlin, Bremen, Hanover, Stuttgart and Cologne will be on strike on Wednesday morning.

Different groups of employees are called upon, such as the counter staff, aircraft technicians or the drivers of the tow tractors who push the aircraft into the correct positions at the airport.