Did you know that you can buy flight-related services with your blue credits? Flight-related services can be bought 24/7 in the Air France and KLM booking tool.
You can book the following flight-related services with blue credits:
On Air France : Extra baggage, select your seat, meals and time to think.
On KLM: Extra baggage, select your seat, Economy Comfort seat and access to the non-Schengen Crown Lounge at Amsterdam Airport Schiphol.