By Joanna Plucinska, Rajesh Kumar Singh and Jesus Calero LONDON/CHICAGO/GDANSK (Reuters) -European airlines Lufthansa and Air ...

AirFrance-KLM said Thursday its net profits quadrupled in the second quarter as fuel prices fell and it flew more passengers.

The NATO summit, which forced KLM to cancel flights at Schiphol, had a negative impact on the airline’s results last quarter.