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.

US military targets IS in Syria strikes
Israeli fire kills three people in Gaza, tension rises
Tens of thousands protest in Minneapolis over fatal ICE shooting
One dead in Australian bush fires
Trump says US needs to own Greenland to deter Russia, China