I learned this summer that I could rent a car in one location in Scotland and drop it off at another, which simplified my travel with BA. It was easy for me to get to Glasgow but on the way back, I needed to change airports in London to make any change from Glasgow. Checked rental car rates with a return to another city just to see what the extra cost would be. . .and there wasn't any.

Returned the car to Aberdeen, which better fit my travel plans, and filed that piece of information away for future trips.