Originally Posted by
FightingIlliniUAL
US doesn't allow standby, but has free same day changes for AA EXP within 6 hours of departure for US metal only.
The US program is called, "Moveup."
http://shopping.usairways.com/en-US/...ds/MoveUp.html
This would apply to the OP:
We waive the MoveUp fee for Dividend Miles Preferred and AAdvantage elite status members. However, the same rules apply: the flight must be within 6 hours of your original scheduled departure, and on the same day with the same number of stops.
LAX-PHX-DFW has 1 stop. LAX-DFW has 0 stops, so moveup wouldn't work in this case (unless you get an agent who really flexes the rules).
There's multiple threads in the US forum about the moveup program. This is our, "go to," thread:
http://www.flyertalk.com/forum/us-ai...er-thread.html