Originally Posted by
KARFA
On the very odd times (I think twice only) that I've had separate reservations, AA have checked a bag through on AA to AA flights (ex-LAX and ex-CUN), but this was over 18-24 months ago, so not sure on the relevance today and if this is still offered.
Of course, two data points do not make a trend - so I would be hesitant to give an affirmative that is consistently applied