Hours. My original post was about the flight times changing & I'd not reveived an e-mail from AA the last 3 trips. I saw the change & over a week later they notify me by e-mail, thus this post. I've had changes by hours (June -July trip last year & Feb. trip this year) & sometimes by minutes over the years... they'd notify me then. That's part of the strangeness of the situation. If you're coming in the discussion now, you already missed the earlier part of the story. One trip I learned of the change - only because I checked my reservations online just before departure... I'd have been heading to the airport when my flight was taking off. Not cool at all. Communication on their end needs to improve. If you're flying AA through MIA, there are bound to be changes &/or delays.