I'm looking at a TATL EWR-ARN that is completely sold out in all classes. What does this actually mean? SK (as all other airlines) oversell their cabins so how is this usually divided between the cabins? Do they oversell C and Y for example, and if they do, how much?

The flight is two weeks away and it's been completely full for at least a week already.

I'm hoping to get an upgrade using Optiontown from Y to C but if C is packed I guess my chances are slim unless someone with a full flex decides to no show, or?


Cheers guys!^