Originally Posted by
NewbieRunner
Have you tried the link in the wiki post?
https://www.miles-and-more.com/onlin...l=en&cid=18002
Which airline are you flying and is it a codeshare? Usually the first letter of the fare basis is the booking class but whether P booking class can be upgraded or not depends on the airline.
Thanks, and yes, I tried the link, but it won't work for me. The return flights are on LH (flight number and metal). I can probably book other partner airlines instead, if that makes it easier, or even book with a different fare basis if it's worthwhile to get the upgrade. I have the reservation on hold for another couple of days.