Originally Posted by
squawk7500
flyingsaucer -- use whatever yardstick you feel comfortable with.
Most folks figure their CPM on the 'banked-miles-yield', usually with bonuses & promos added in. Hardcore addicts often include costs for parking, meals & reading-material!
The 'price difference' model is a rather new wrinkle, but if it works for you -- why not ^ It's ALL about the value. Enjoy.
Re: getting near to aircraft. Ever consider popping a few quid for an introductory flying lesson ??

I take this concept and continue with it...
If I can get something out of the run (say, seeing an Eric Clapton concert at the Royal Albert Hall in London), I factor that in too... What is an afternoon at the FLL beach (Or Gold Coast?) worth to you, for example?