zsmith2,
it is true - this JUST happened to me. I have a KL-issued ticket and for the domestic part of the itin (2 flights to/from DTW) showed not eligible for an UG. I emailed DL and this is what they said:
Originally Posted by Delta Medallion Desk
Unfortunately after reviewing your reservation this ticket was booked as a KLM marketed flight by your travel agency. The flight needs to be booked as a Delta marketed flight in order to be eligible to be placed on the automatic upgrade list. [...] In the future we recommend you requesting your agency to book directly with Delta to ensure you are listed properly.
Last edited by florin; Mar 24, 2011 at 11:08 am