Berlin Airport has cancelled all its flights for Wednesday as ground staff go on strike to demand higher pay.
The walk-out has affected about 300 flights to and from the German capital.
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Labour union Verdi said its members are seeking a rise of 500 euro (£441.51) per month.
Employers have offered staff a one-off payment of 2,000 euro (£1,766.05), German news agency dpa reported.
Germany experienced its highest annual inflation in more than 70 years last year.
Surges in the cost of food and energy saw full-year inflation reach 7.9% in 2022.
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