Originally Posted by
westcoastbmx
Thanks for the quick response. I will review what your sourced. I haven't booked it yet but it but it will be an upgrade from Economy to Business Class only.
You cannot upgrade from Economy ("Voyageur") to Business Class ("Affaires") on Air France using Flying Blue miles.
There is a "Premium Voyageur" (premium economy) cabin in between these cabins on AF - and as you can only upgrade by one cabin class, upgrades from full-fare economy class tickets will put you in the Premium Voyageur cabin.
In order to upgrade to Business Class, you would need to hold a Premium Voyageur ticket issued in an upgradeable fare class.
It goes without saying that in order to upgrade to any of the classes under discussion here, there needs to be seats available in the appropriate upgrade bucket in the cabin which you are trying to upgrade to.