OK, I think on AA award tickets you can change the date as long as the departure and arrival airports remain the same. Can you also upgrade the class and date buy just paying the miles difference? I have a 2 one way economy awards tickets back to SFO from UIO and I might want to extend the trip a week. As of now there are onlyBusiness/FirstMileSAAver* and I dont mind paying the miles difference for the upgrade. Is this do able and will there be fees? Thanks for any advice!!