Originally Posted by
PHLFlyer
DL has eliminated the availability of Z class on DL marketed/AF operated flights since December. Z was the fare class used for Skymiles upgrades. This was done without advance notice to AF or Skymiles members. The passengers are accepted in economy as that is what DL remits to AF since suppressing the miles upgrades.
If indeed true then that's very bad news! Especially for those using "Z" upgrades on "AF only" routes like LAX/SFO/BOS/PHL-CDG. I know that these upgrades were hard to get but i was able to use PMU's/miles for upgrades from LAX to CDG several times during the last years.