Striking staff have forced Irish airline Ryanair to cancel around 250 flights today which has potentially affected tens of thousands of passengers travelling across Europe.
A dispute over pay and conditions between the budget airline and staff in six European countries will see them walk out for 24 hours.
News agency Press Association says Ryanair had to cancel 150 flights due to a strike in Spain, Belgium, the Netherlands, Portugal and Italy.
The airline said pilots in Germany would also be going on strike.
Ryanairs chief operations officer Peter Bellew said the action was "deeply regrettable".
"It is deeply disappointing that some of our customers and our people in Germany tomorrow will have their flights disrupted by an unnecessary strike called at short notice," he said.
These strikes are the latest in a series of walkouts. On September 12 dozens of flights were cancelled in Germany after pilots and flight attendants refused to work for 24 hours.
In August several days of strikes involving staff in Ireland, Germany, Sweden, Belgium and the Netherlands saw hundreds of flights cancelled.
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