Originally Posted by
dvs7310
Well its not all carriers can upgrade all others... don't know how well the other Skyteam carriers are implementing this but CO is only doing NW, DL, AF, and KL... in reality its only adding AF and DL since NW and KL could already be upgraded on more flexible terms.
This is not correct. Please read the ST rules in regard to that. It really does mean that ALL carriers can upgrade on ALL carriers (exception being SU cannot do AZ and vice versa, but all other combinations are possible). Has to be a full Y fare.