Originally Posted by
BER Flyer
A If you are complain about the difficult mileage/certs upgrades keep in mind that DELTA could have cleared you in advance any day they wanted too but they choose not to do so.
An important point, but not related to the issue at hand. This is about day of departure upgrades that are purchased that day, only at AMS, not about pax waitlisted for upgrade by DL using DL upgrade instruments.