Originally Posted by
UnevenGray
How did you phrase the departure airport change? I may need to do this in the future and want to be prepared.
Just simply ask. The weirder/more wordier you make request, the more chance they say no. Just simply state "I know you can change departure (or destination) airport due to schedule change, can we see about flights to/from XYC instead?"
It does need to be reasonable. Ie same state/region (I've been told both 300 and 500 mile radius multiple times) It can even be to airport in another country
The quoted change from AUS to ATL, IME is more to do with it being a hub airport switching to. Generally I wouldn't expect that big of a change.