<prompt> Human: Im trying to figure out the best way to determine whether I should be driving or flying. How do I determine the true cost of driving? I make a 2-4 times per month for two nights. Im not sure how to factor in wear and tear, etc. travel time for each is about the same due to layover. Details below Cost of Flight- 300-400 round trip Parking - 5dayRequires ground transportation of about 50 total. Vehicle: Early 2000s Ford F-15017mpgOwned outright, no payments Trip:800 miles round tripWhat is the more economical choice?  <response>: Using the IRS tax rate for business miles good standard, is 460 a trip. Id probably fly, but thats me. 