Airline KLM has transported more passengers in July compared to the same period last year. Passenger numbers grew in the summer month, despite the major fuel outage at Schiphol. As a result, hundreds of flights were canceled at the end of July.

KLM had 2.2 percent more passengers on its aircraft than a year ago. That amounts to almost 3.2 million travelers.

The passenger growth was mainly seen at destinations in Europe, North Africa, Asia and North America. Substantial declines were seen at destinations in South America and the Middle East.

The airline does not tell the exact consequences of the fuel failure on KLM in July. The failure at the Aircraft Fuel Supply refueling company led to hundreds of canceled flights, major delays and thousands of stranded passengers at the end of July.

Also increase at Air France

KLM's freight transport did show a sharp decline. "Due to the different developments in the markets and also fuel costs, we have to stay sharp and prepare further, says KLM CEO Pieter Elbers.

Air France, KLM's partner at Air France-KLM, reported passenger growth of 0.1 percent to more than 5 million travelers. The figures at Air France-KLM resulted in a total increase in the number of passengers by 1.8 percent to just under ten million travelers.