Flight cancellations at Hamburg Airport after a surprise strike by workers affected more than 40,000 passengers on Sunday, a day before a planned wider protest across Germany amid new contract negotiations.

Only 10 of more than 280 scheduled flights went as planned early Sunday, the airport said. Many service desks sat empty as would-be passengers lined up to seek information about the cancellations. One big electronic departure board overhead had “canceled” in red next to the list of all flights.

The surprise walkout, which reportedly took place with only about a half-hour advance notice, came before a broader series of preannounced strikes across 13 airports in Germany on Monday, organized by the ver.di union.

The union, whose members work in areas including passenger services and cargo and goods screening, called for Sunday's strike by security control staff to put pressure on company representatives amid collective bargaining talks.

“The behavior of the trade union ver.di is dishonorable: The strike without notice hits Hamburg Airport at the start of the vacation season," airport spokeswoman Katja Bromm said in a statement. She said that on Monday, arrivals would be possible, and that “considerable disruptions and cancellations” were expected.

Bromm said that Sunday's walkouts were "excessive and unfair to tens of thousands of travelers who have nothing to do with the disputes.”

For months, ver.di has been negotiating a new agreement that aims to improve occupational health and safety, provide more vacation days, an increase in the annual bonus to 50% and the freedom to choose a doctor for employees’ regular, mandatory medical exams, among other things.

Lars Stubbe, a trade union official, said that “a strike must cause economic damage.”

“We know that it is a massive burden for passengers. Our colleagues know that too. But they have said we have to go on strike. It must be effective, so that we have a reasonable offer to negotiate,” he said.

Some would-be passengers didn't hide their frustration.

“I also wonder why it’s like this, because it was supposed to be a big strike tomorrow (Monday) — and why is it today?” said Alva Wetzel, who had hoped to travel. “It’s just stupid.”

(AP)

Flight cancellations at Germany's Hamburg Airport affect more than 40,000 passengers after strike