More than half a million people are facing travel disruption at German airports on Monday where a 24-hour strike has led to thousands of flight cancellations in a dispute about workers' pay.

Air traffic at Germany’s major airports ground to a near standstill on Monday after labor union Ver.di called on ground personnel, baggage handlers and security staff to go on strike.

BERLIN — A one-day strike by workers at 13 German airports, including the Frankfurt and Munich hubs and all the country’s other main destinations, caused the cancelation of most flights on Monday. The 24-hour walkout, which started at midnight, involves public-sector employees at the airports as well as ground and security staff.