FRANKFURT - Airlines cancelled about 450 out of 1,300 flights scheduled at Germany's largest airport Frankfurt on Tuesday because of warning strikes by ground handlers in a dispute over pay, operator Fraport said.
Ground handlers at airports in Munich, Duesseldorf and Cologne also walked out. They are expected to return to their posts by early afternoon.
Deutsche Lufthansa, which operates a total of about 1,850 flights on a typical day, said it cancelled about 400 of its flights planned for Tuesday, in line with its expectations.
Smaller peer Air Berlin said 23 flights out of the several hundred scheduled would not operate - more than the expected eight cancellations.
More strikes may follow soon.