Dont be put off Tempelhof or long distance with only 3 days. We went out to Berlin from London Saturday morning and back Sunday morning 2 weeks ago. 5 hours approx each way with one stop in Holland. Great if you have good weather.
Last year we managed west coast of France, across the Pyreenes, northern Spain and back up the Rhone valley in 3 days. That was my first touring trip of Europe.
It is the stopping and time on the ground at airfields that takes all the time, not the time in the air.