The strike affects around 300 flights to and from the German capital.
The Verdi trade union states that its members are seeking a salary increase of 500 euros, equivalent to 6,123 kroner, per month.
The German news agency dpa reports that employers have offered staff a one-off compensation of 2,000 euros (22,265 kroner).
High inflation stirs the economy
Germany experienced its highest annual inflation in more than 70 years last year.
Sharp increases in the costs of food and energy meant that full-year inflation reached 7.9 percent in 2022.