I fly for Pilots N Paws. According to a letter sent from the FAA and IRS, all expenses relating to the charity flight are deductible. I figure out a per hour cost of my 310 and then add whatever fuel. That's just for the operation of the flight. If I stayed in a hotel or had any other expense, I can claim that as well. Basically, the ONLY thing you cannot claim is your time. So an example of a flight for me;
3 hour round trip
$250/hr to operate (oil, maintenance, and engine reserve) and $450 in fuel (ouch I know)
I claim all $1300 as a donation.
Hope this helps.
