Alaska Airlines Mileage Plan - Retroactively Change FF # to AA #

Hello everyone, thank you in advance to your insight. Does anyone know if it's possible to change your frequent flyer number on a flight retroactively from an Alaska number to an American number - for this scenario it would just be more beneficial to have the miles post to the American account.

Hello everyone, thank you in advance to your insight. Does anyone know if it's possible to change your frequent flyer number on a flight retroactively from an Alaska number to an American number - for this scenario it would just be more beneficial to have the miles post to the American account.

Once you've taken the flight you're pretty much SOL.

Hello everyone, thank you in advance to your insight. Does anyone know if it's possible to change your frequent flyer number on a flight retroactively from an Alaska number to an American number - for this scenario it would just be more beneficial to have the miles post to the American account.
Anything is possible. You'll have to make a lot of phone calls and try to convince a lot of people, but yes I would say it is physically possible for them to do this, nothing is set in stone.

Anything is possible. You'll have to make a lot of phone calls and try to convince a lot of people, but yes I would say it is physically possible for them to do this, nothing is set in stone.

Please don't give them hope. The flight is already credited. Period. End of story. Full stop.

Anything is possible. You'll have to make a lot of phone calls and try to convince a lot of people, but yes I would say it is physically possible for them to do this, nothing is set in stone.

With the airlines, anything is not possible. With having taken the trip and probably have it alredy credited there is pretty much 0 chance of having it changed to a diff FF program.