Originally Posted by
MJLogan
R is the award class for upgrades from B-class coach.
As someone said before, the bucket for WBC awards and upgrades from S/B fares is D. I have never heard of the existence of an R class at KLM, so it comes as a surprise that the Skyteam RTW now has to be booked in that class. KLM's other RTW option books in C.