Franco-Dutch airline Air France-KLM beat forecasts with a return to profit last year, helped by a drop in the fuel bill and growth in passenger numbers, lifting its shares close to a nine-month high on Thursday.
The carrier achieved an operating result of 816 million euros, compared with a loss of 129 million in 2014, it said in a statement.
This beat analysts' average forecast of 544 million in a Reuters poll.
The company cautioned, however, that pressure on ticket prices from increased competition would eat into the benefits of cheaper fuel this year, though it maintained its medium-term financial targets.
"The global context in 2016 remains highly uncertain regarding fuel prices, the continuation of the overcapacity situation on several markets, and the geopolitical and economic context in which we operate," the airline said.