With airline traffic almost back to 2019 levels, the resurgence of congestion at key airports is increasing the need for ‘slot management’ – the independent coordination of flight schedules and resources at the busiest gateways. “Coordinating flight flows and the services and infrastructure supporting them has always been a delicate balancing act at the most in-demand airports,” highlights Neil Garwood, CEO of UK-based Airport Coordination Limited (ACL), the world’s largest independent slot management company.