Just curious if anyone has had any experience with these upgrades with the AM codeshares gone. Previously of course, the only way to upgrade an AM flight was to book the DL flight number, and then DL would process the upgrade as normal. (And v/v for AM elites on DL flights.)

Now of course, there are no more DL coded AM flights (though there are still AM coded DL flights). I have a need for one coming up in a couple weeks, so this is my first time feeling the burn of not having this option. Has anyone experienced anything on the AM side with them honoring DL elite upgrades, even if at the gate, given the situation?

Thanks if anyone has any feedback.