Originally Posted by
btonkid12345
What was your main cabin fare class? Thanks.
Main cabin fare class is not a factor determining priority on the GUC upgrade list. See "Enjoying Priority" here:
https://www.delta.com/content/www/en...-upgrades.html
I would guess in the previous poster's situation, someone bought a business class seat on the flight or changed from a different flight/routing/date ... seems pretty straightforward.