A bookings slump after the Paris terrorist attacks led to a €70 million drop in revenues in December at Air France-KLM.
However, bookings picked up towards the end of the month, suggesting a "progressive recovery", the airline said.
The airline suffered a €50 million fall in revenues in November after the attacks, in which 130 people were killed.
North America and Asia flights were particularly affected last month, the airline said.
The airline said: "The negative impact of the Paris attacks on December revenues is estimated to be around €70 milion, with significant easing during the last two weeks.
"Booking trends in December were in line with a progressive recovery."
Passenger numbers on Air France, KLM, and HOP! dropped by 1.1% to 6.2 million.
But once Dutch budget airline Transavia was included, total passenger numbers were "stable" at 6.7 million.
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