Originally Posted by QRC3288

The thrust of your question is this: do sub-fare classes matter in op-up priority.

The answer to your question, in the general view of this board: No

The most important factors are your status, op-up priority hierarchy and CIV ("customer intrinsic value"). CIV is only a tie-breaker within the same hierarchy level so in your case, it's basically irrelevant.

However, it's not a golden rule. A lot of times, check-in agents will be razzled, there might be some operational situations that arise, other flights could delay/cancel at last minute creating problems, or whatever, but it's totally possible for folks with zero status whatsoever to be op-upped. However, in the general view of this board, whether you buy a slightly cheaper or more expensive economy ticket would be irrelevant.