Dr. Milica Kalić is Full Professor of Transportation networks, Airline planning and operations, Basics of Air transport and Airline Business and Organization with the University of Belgrade – Faculty of Transport and Traffic Engineering (UB-FTTE), Serbia. She acquired BSc, MSc and PhD degrees in air transportation from the UB-FTTE. She is currently the head of the Department of Air Transportation and the head of Division of Aircraft Operation and Air Transport Planning and Management. She has authored more than 100 papers published in the international scientific journals, monographs, and conference proceedings. She is a member of Scientific and Programme Committee of EURO Working Group on Transportation (EWGT) conference. Her research interests include airline planning and operations (revenue management, air network design, airline scheduling, air passenger demand prediction etc.), and application of soft computing techniques in the field of transport. Dr. Slavica Dožić is Assistant Professor of Transportation networks, Airline planning and operations, Basics of Air transport, Airline fleet and network planning and management, and Fleet management with the University of Belgrade – Faculty of Transport and Traffic Engineering (FTTE), Serbia. She acquired BSc, MSc and PhD degrees in air transportation from the UB-FTTE. She has authored more than 35 papers in published in the international scientific journals, monographs, and conference proceedings. She won the best graduated student award at the Air Transportation Department of The Faculty of Transport and Traffic Engineering ""Zoran Radosavljevic"" (2001), the best paper of the session award at the 1st ICRAT (International Conference for Research in Air Transportation) hold in Žilina, Slovakia (2004), and the award for the best master's thesis of University and college students for the school year 2007/2008 by Belgrade Chamber of Commerce. Her research interests include the airline planning and operations (fleet planning, air network design, airline scheduling, air passenger demand prediction etc.), multi-criteria decision making in air transportation, and application of the soft computing techniques in the field of transport. Dr. Danica Babić is Assistant Professor of Transportation networks, Airline planning and operations, Basics of Air transport, Airline fleet and network planning and management, and Airline planning and operation management with the University of Belgrade – Faculty of Transport and Traffic Engineering (FTTE), Serbia. She acquired BSc, MSc and PhD in the field of air transportation from the UB-FTTE. She is the author of more than 25 papers published in the international scientific journals and conference proceedings. She won the Faculty Award for outstanding achievement in the fifth year of study in the 2003/04 school year and the Đoko Vlajković Endowment Award for the best scientific work of the young scientists of the University of Belgrade, published in the group of technical and technological sciences (2017/2018). Her research interests include the airline planning and operations (revenue management, air network design, airline scheduling, air passenger demand prediction etc.), and application of the soft computing techniques in the field of transport.