This paper proposes a method for reducing the time to complete the boarding of a two-door airplane when its passengers are transported from the airport terminal to the airplane using two apron buses. In contrast to other methods that assign passengers to apron buses. our method considers groups of passengers traveling together (e. g. https://www.bekindtopets.com/hot-offer-Stuart-Product-Emcelle-Tocopherol-Vitamin-E-Liquid-1-Liter-hot-value/