Midwest Miles members can earn up to 20,000 miles when booking multiple air+car or air+hotel packages with Midwest in 2008. Book one qualifying trip and receive 500 miles; book two to get 5,000 miles, three for 10,000 miles and four for 20,000 miles. Enter promotion code MILES08 at the time of booking your vacation package at http://www.midwestairlinesvacations.com by Nov. 30, 2008 and complete travel by Dec. 21, 2008 to receive your bonus miles.