Last year, I booked an award ticket for a business trip to California. I did not submit for any kind of reimbursement, but on my taxes I put $300 towards "performing artists/teacher/etc. expenses", as $300 seemed a fair and a easily verifiable price for a what a ticket from DFW-SFO would cost (unless you happened to get a good sale for maybe $220/250). I ended not being able to claim the performing artist expenses anyway, though, since I only had one W-2 from a performing arts company last year and not the minimum of two as required by the IRS rules (I think). In hindsight, it wasn't a good thing to try in the first place, and I won't do that again.