11% more, Inflation is in check, right? Gas costs more. Corn costs more. So it shouldn't be a huge surprise that your Thanksgiving also will set you back more. The average cost of a typical American Thanksgiving dinner for 10 hit $42.26 this year -- an 11 percent increase over last year's prices for the same dinner of turkey, stuffing, cranberries, pumpkin pie and all the trimmings, according to the American Farm Bureau Federation.