A large proportion of the carbon emissions from flights come from takeoff (you have to haul the plane, full of fuel, up through the gravitational potential)
I was more asking in the context of the French carbon production, not just the airlines
Most of France is Nuclear powered, and they haven't outlawed breeder reactors (which recycles spent fuel) for regan-esque cold war reasons, so with electric cars on the horizon soon and electric trains now, they're well positioned to Nope right out of the global fossil fuel race/struggle.