Update 2022-03-21: Frankfurt Airport already announced that due to the strikes, similar to past strikes, only transit passengers could be handled. Boarding is therefore not possible.
2022-03-21: For Tuesday (22 March), the trade union Verdi is calling for strikes by security staff at the airports in the cities of Berlin, Bremen, Düsseldorf, Frankfurt, Hamburg, Hanover, Cologne/Bonn and Stuttgart. Considering the effects of past strikes, massive restrictions are to be expected.
In case of a strike, major air traffic disruptions are to be expected. Delays and flight cancellations are likely. Before and after official strike hours, disruptions are also possible due to organisational reasons. Passengers are advised to contact their airline or tour operator about the current flight status in advance to their journey to the airport and to schedule additional time for their journey.