Science and Education Publishing American Journal of Mechanical Engineering 2328-4110 3 2 2015 05 04 BDR Modelling of Passenger Queues at Nnamdi Azikiwe International Airport, Abuja, Nigeria 63 71 EN Nuhu A. Ademoh Department Of Mechanical Engineering, Federal University of Technology, Minna, Nigeria Anosike Esther Nneka Department Of Mechanical Engineering, Federal University of Technology, Minna, Nigeria AJME2015325 10.12691/ajme-3-2-5 2015 01 06 2015 02 09 2015 05 04 A nation's air industry is vital to her development as it offers inter-linkages for all the economic sectors. International airport of a country's capital city acts as gateway and gives lots of first hand impression of her integrity. Nnamdi Azikiwe International Airport, the gateway to Nigeria's capital city, Abuja, faces problem of passengers queuing for boarding, departure and arrival at different rates due to ineffectiveness in management of travelers using the facility. This never gave travelers, particularly international passengers a good impression of the country. As part solution, this study developed a queuing model using Birth and Death Rate approach to simulate the problem and find enduring solution. Four air transport companies consisting two each of domestic and international operators that frequently use the facility was adopted as study samples. Their 2013 flight data were used to simulate model for validation. Result showed that in order to meet current daily passenger need each domestic airline required at least 5 aircrafts. Each international airline required one additional aircraft to effectively service the monthly average demands of 21,863 passengers. The system required 0.5 service factor and utilization factors of 0.4, 0.6 and 0.9 at 5% significance.