The airline industry is important for the global economy. Airports, in particular hub airports, are the backbone of air transportation. Operations in the terminal and at the airfield as well as the runways need to be planned in an efficient way. This special issue is dedicated to operations research methods supporting airport operations management. Large airports require a diversity of tasks to be performed and problems to be solved. Amongst them are resource allocation problems (e.g. gates/stands, check-in desks, baggage station or carousels); sequencing or scheduling problems (e.g. runway sequencing); timetabling and rostering problems (e.g. check-in or security staff); or routing problems (e.g. for aircraft). But many other problems can also be found in airports, such as facility location or passenger flow prediction and optimisation. Airports are key for the air transportation system, and inefficiencies there can have knockon effects throughout the air transportation system, delaying flights and potentially increasing pollutant emissions as well as costs. Modern research trends are moving beyond the traditional static individual problems, considering multi-objective problems and trade-offs (e.g. fuel vs. cost vs. time), combined problems (e.g. runway sequencing and trajectory optimisation), dynamic and stochastic problems, creating more robust solutions, or considering some of the complex real-world constraints which can cause problems for the elegant solutions we may prefer. Perhaps unsurprisingly, this focus was observed in the research papers submitted for this special issue. From the 21 papers submitted to this special issue, the B Raik Stolletz