<prompt> Human: Im a one person consulting firm and travel almost every week. Im maxing out my 401k and defined benefits plan already, so Im wondering when should I feel ok about booking first class? Im 6-4 so flying in FC is a lot better. Do you book first class?  <response>: Are we talking domestic or international?If international, first class is never worth it in my view. Business class is a much better compromise. You still get good food, and lie flat beds.For domestic, first class can be worth it depending on the airline and price. Some of the Delta flights Ive booked only charged 30 more for first class. It was worth it in my view going from LA to Atlanta. Also, first class tickets are effectively less expensive if paid with miles compared with economy, so factor that in. An example I encountered with Delta, a round trip economy ticket from LA to Chicago was 30,000 miles or 500 dollars. A Delta comfort ticket was 40,000 miles or 900 dollars, and a first class ticket was 54,000 miles or 1,500 dollars. 