"This latest tranche of state aid to Air France combined with these ineffective remedies will damage competition in the air transport market for decades to come," the airline said in an emailed statement.

"The 18 slots that Air France is being required to make available is nowhere near enough to allow others to offer a competitive challenge to Air France's dominance at Paris Charles de Gaulle and Paris Orly airports," the statement said.

(Reporting by Conor Humphries and Laurence Frost; editing by David Evans)