Nick, sounds like a good rule of thumb, percentages based on flight cost or flight and equipment cost? I'm going with my Dad, and I figure if we are both paying $150, then the guy is making out really well. I have gone on an all inclusive cruise and had those guys taking care of my every need, and only tipped $150 (based on the percentage rule). the pilot may just fly out and drop me off, other than getting me in and out safely, what "Service" did he provide to warrant a nice tip? that is truly my dilemma.