We're due to travel with Air France over the summer and my daughter will turn twelve during the trip.
I know that whether you pay an adult or child fare in this circumstance is dependent on the airline. I can't find anything for Air France on their website or by googling, and their phone line is saturated and says to call back later.
When I try to book, it won't let me book a youth fare (12-17 years, pretty much same price as adult fare) and tells me to book a child fare. However, I have an inkling that I read somewhere that Air France requires a youth ticket in this case.
I contacted Transavia, which is a subsidiary of Air France, and they require you to book an adult fare but their system won't allow you to do it. You are supposed to book the outward and return legs on separate bookings. Transavia doesn't charge more for single tickets though, and I think Air France still does.
Does anyone know Air France's rules for this?