Originally Posted by
Changeup2000
From my recent experience, the rule of thumb is:
(1) If you switch to an AC operated flight, you will be put in R class and seated in J;
(2) If you switch to a partner flight in an AC flight number (codeshare), you will be put into your original class and seated in Y/PY; and
(3) If you switch to a partner flight in its own flight number, you will be seated in J and put into a fare class corresponding to a J cabin (can be J, D, P, C, or Z, I saw them all).
All three of those can easily be disproven from loading the reaccom flow on my only booking with a schedule change.
(1) If it's a NEW AC operated flight, I'm back in the original cabin. If I change AC 123 - AC 456 to AC 123 - AC 789, I keep R on 123 but back in the original class on 789
(2) I'm being offered PY on SK when my original booking was Latitude, so it's not the original cabin
(3) That previous SK flight is the native flight number