Originally Posted by
ILuvParis
Another thing to be aware of when standing by (and I don't know whether this is actually true, or was just the gate agent telling me AA's policy for that airport - LAX IIRC), but I was informed that when flying standby, you cannot carry on a rollerboard. I was told I would have to check my bag.
Seems that would only be true if you were the last to board on a full flight and there is no more space in the overhead bins. There is no reason why you can't bring your carry-on on an open flight.