If you have time to spare..........................go by air !
Generally speaking any journey that would be up to 200 miles by car will always be quicker door to door by car, and of course much cheaper.
As for fun, then the 'plane every time
A private flight can not really be considered 'practical or cost effective'
But if you don't need justification and can afford to miss an appointment due to bad weather, then enjoy
Personally I only fly professionally now, but if I were to fly for fun then I would do so in a small 3 axis microlight away from airfields etc.
For me the fun is simply 'being up there'
Cheers
UTF