Workers across the European Union are staging a series of protests and strikes against rising unemployment
Smaller strikes were reported in Greece, Italy and Belgium, and rallies were planned in other countries.
Hundreds of flights have been cancelled in Spain and Portugal.
Airlines are recommending passengers check the schedules before setting out to airports.
The European Trade Union Confederation has co-ordinated the Europe-wide action.
The confederation’s Judith Kirton-Darling told the media that austerity was not working.
“It’s increasing inequalities, it’s increasing the social instability in society and it’s not resolving the economic crisis,” she said.
Some 40 groups from 23 countries are involved in Wednesday’s demonstrations