Background: With the air traffic volume continues to grow worldwide, more efficient air traffic is required.Objective: This article attempts to review recent advances for more efficient air traffic. Method: Over 70 recently published patents, and journal and conference papers for the recent developments in air traffic flow management are reviewed. The research topics discussed are flight trajectory, flight route optimization, flight route planning and aircraft separations, airport capacity, weather related issues, and the automatic dependent surveillance-broadcast related technology. Results: A number of new solutions to the issues and recent inventions, findings and developments are discussed. Conclusions: Research on safety, capacity and efficiency of air traffic is intensively performed worldwide, resulting in many new findings and new solutions/inventions to various issues. New ATM technologies such as ADS-B can promote enhanced efficiency and safety. The implementation of ADS-B may also result in significant environmental benefits. As more university faculties and researchers have started research and development projects for next-generation air traffic flow management, more innovative outcomes can be expected in the near future.