Lufthansa-owned British Midland International (BMI) made an operating loss of €145 million in 2010.
The figure was revealed in the Lufthansa Group’s annual results, released today (March 17).
In a statement, Lufthansa Group said Bmi is "implementing restructuring measures".
The airline group made a net profit of €1.1 billion last year, with German carrier Lufthansa recording an operating profit of 382 million.
The figure is a turn-around from the previous year, when the airline made an operating loss of 107 million euros.
Christoph Franz, Lufthansa’s CEO, said the group’s profits were mainly due to a rise in international traffic, as well as cost reduction measures.
Looking ahead, he said the groups is confident for the coming year, but warned “2011 will not be a walk in the park”.
“The headwinds of competition are becoming rougher on the European routes and long-haul routes to Asia and the Americas,” he said.
“The fuel prices are at record levels. And we are not immune to the consequences of political unrest, terrorist attacks and natural disasters.”
Other members of the Lufthansa Group Austrian Airlines and German Wings made an operating loss of €66 million and €39 million respectively, while Swiss tripled its 2009 figure to make a €298 million operating profit.