Originally Posted by ESpen36

If you want to do a different routing, you likely will have to pay fare difference plus change fee in order to have your ticket reissued on the new routing.


But if you want to standby for a later MIA-BOS flight, and then a later connecting BOS-LGA, you can do it for free. If you want to do so, simply go to the airport and use the kiosk, or ask an AAgent, to put you on the list for the later flight. But you must do the above in person at the airport, not over the phone. Of course, with the free standby option, you will be taking the risk that if for some reason all flights are booked full for the rest of the day, and you cannot get on any of them, you will be SOL (you ticket's value becomes zero after the last flight of the day on your routing departs).

The alternative is to use Confirmed Flight Change, as the previous poster explained. It costs $50 and allows you to confirm a change to earlier or later flights departing within 12 hours before or after the originally scheduled flights, subject to availability of seats in the "E" fare bucket.


IMPORTANT: Regardless of whether you do CFC or free standby, you MUST call AA and have somebody cancel out the original segments before the first original segment departs. Otherwise, if you do not board the original flights, you will be marked a "No-Show" and your ticket will have no value immediately after the first scheduled flight on your itinerary departs.