The company’s move back into the black came despite problems with unions and the terrorist attacks in Paris.
A net loss of €225 million last year was turned into a profit of €118 million. Revenue rose from €24.9 billion to €26 billion. The company’s fuel bill fell 6.7% to €6.2 billion.
Net debt across the group was cut by more than €1 billion to €4.3 billion.
Chairman and chief executive Alexandre de Juniac, said he was pleased with the results but warned that the future remained uncertain.
“In spite of the favourable environment created by lower fuel prices, we confirm our ambition to improve our competitiveness within an economic and geopolitical context that remains very uncertain.”