While not flying yet, I've given this some thought myself.
I already take the standard 34.5 cents per mile deduction for business mileage I put on my privately owned Dodge Ram.
So lets say for example that I visit a customer exactly 100 miles away.
That's a 200 mile round trip that I would be able to take the expense deduction of $69.00 if traveling in my pickup.
If I make that same trip in my RV, and therefore take the same mileage deduction, I would pay for my fuel figuring 200mph for one hour flight time at a fuel burn of 10gph at $3.00/gal approx. fuel cost = $30.00 for the fuel.
So at a worse case scenario, and if I don't want to do anything that will "flag" a computer at the IRS, I figure I can at least pay for my fuel expenses (and then some) on business trips if I simply take a standard automotive deduction for the trip based on "road" miles (which is always more than actual miles traveled by air).
Of course, I wouldn't be able to deduct the cost of a rent car at the destination ("Why did you rent a car if you drove there in your own car in the first place?"), but I figure I can avoid that cost since my customer will get a kick out of picking me up and being able to check out the RV.
![Wink ;) ;)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
(He might even get a ride if he spends enough money with me
![Big grin :D :D](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
)
Tax deduction for aircraft, especially privately owned, is a terribly confusing and messy proposition. I figure that if a person has only an occasional need to use their private aircraft for business use, then taking the auto deduction at least pays for the basic expense of fuel and has the benefit of keeping the IRS off your back.
That's my take, anyway.