Originally Posted by
TerryK
Only for 7 carriers (out of 27) closely linked to LH. CDYB fares only for the other 20 *A carriers.
There are only 16 *A carriers in the *A upgrade program
With M&M, SQ, NZ, NH, UA, SK, LX, OS, LO etc. have more booking classes to upgrade from. OZ, AC, CO, CA, JJ, TP, TG and TK require Y and B for an upgrade to Business Class.
But the problem is not really the booking classes, it is the ridiculous amount of miles required for the upgrade with M&M.