Workers at airports including Munich, Hamburg and Frankfurt went on strike Friday.
After an IT outage Wednesday, this is the latest nightmare for German airline Lufthansa.
Workers at seven German airports, including Munich, Frankfurt, and Hamburg, took collective action Friday, according to CNN.
The full-day strike halted Lufthansa's operations in Frankfurt and Munich Friday, affecting thousands of would-be passengers.
In all, more than 2,000 flights were canceled on affected airlines, according to CNN, interrupting travel for more than 295,000 people.