Originally Posted by
kayexalate
Just called and spoke to Alaska Airlines to check and rep said changing the FF # to an AA one SHOULD not affect the reservation and my 1st class upgrade (for me and my companion) but I got gunshy and didn't want to risk it, so I just left it as is.
Guess I'll never know!
They are incorrect. While the two aren't necessarily tied by technology...
the policy is that to take advantage of your MVP Gold Upgrade, you have to accrue to Mileage Plan.