While most airline mileage charts demand a flat rate for travel within a given region, some programs calculate mileage costs based on distance flown. (pointsaway.com)
Since you're booking with your American miles, it's the AA mileage chart that will apply anyway. (upgradedpoints.com)
Some of the key points are that they will be simplifying mileage charts and redemptions. (globetrotterhq.com)