Originally Posted by CO Insider
F class will be the class of service used for mileage and Elite upgrades (replacing R class)
Cool, thanks! F was actually used for mileage/elite upgrades until a few years ago.
Originally Posted by KVS
CO's R class is now available via the Sabre: ITN method of the KVS Tool, instead of Amadeus: AUA
And apparently, ExpertFlyer is now showing "R" inventory as well!!! ^ ^ ^
(Although I don't think "E" or "G" inventory shows -
)