KLM cancelled dozens of flights on Monday after ground staff at Amsterdam's Schiphol airport staged a two-hour strike in a dispute over pay.
The strike was called after a deadline to reach a new pay agreement between the airline and the trade union expired on Friday.
The union’s demands include an 8 per cent pay rise spread over two years, more full-time contracts and a more regular shift rota.
On Thursday, KLM offered a 6-7 per cent pay rise over three years, which the unions rejected.

Trump not satisfied with Iran's latest proposal, will not 'leave war early'
Iran sends proposal for negotiations with US to mediator Pakistan
Iran threatens painful response if US renews attacks
US Navy acting 'like pirates' to carry out naval blockade of Iranian ports, says Trump
