Due to a four-day strike taken up by more than 4,000 of its pilots, Lufthansa had to cancel about 800 flights on Monday, affecting 10,000 passengers.

"Usually we have 1,800 flights a day. For today, we foresee about 1,000 flights planned, but there may be more flights that could be canceled during the day", the airline warned. As estimated by the airline's officials, it's per day loss due to the strike, comes out to be Euro25m.

The officials have clarified that they have been trying hard to rebook their passengers in partner airlines or trains. They have also refunded the money to those passengers whom they couldn't reschedule.

"They're giving us the service and support to get us where we need to go. They wouldn't upgrade us to business class but it could have been worse", said Shane Parkinson, who was flying from Germany to Sicily, whose original flight from Frankfurt was scrapped.

The pilots are demanding an increase in their security level and the adoption of German Labor conditions by Lufthansa.