Following part I of the survey, this paper considers the problems of improving the safety and efficiency of air traffic flows. The main challenge in conflict detection and resolution by traditional optimization methods is computation time: tens and even hundreds of seconds are required. However, this is not so much for response in real situations. Deep reinforcement learning has recently become widespread due to solving high-dimensional decision problems with nonlinearity in an acceptable time. Research works on the use of deep reinforcement learning in air traffic management have appeared in the last few years. Part II focuses on the application of this promising approach to the following problems: detecting and resolving aircraft conflicts, reducing the complexity of air traffic at the national or continental level (a large-scale problem), and increasing the efficiency of airport runways through the improved planning of aircraft landings.