Frankfurt and Hamburg airports will be the hardest hit today when 52,000 employees of Lufthansa go on strike, a union official said Sunday.
All other German airports served by Germany's biggest airline will also be affected by the massive walkout, union spokesman Harald Reutter said.
The airline advised U.S. passengers to check their flight status by calling (800) 399-5838 or (800) 645-3880, or by going online to www.lufthansa.com "> www.lufthansa.com .
The union, which represents workers of Lufthansa ground crews and service personnel, sought a pay increase of 9.8% this year. The union rejected a Lufthansa offer of 6.7% spread through February 2010, plus a one-time bonus payment, and the dispute has not been resolved.