Flight Control HD

There is virtually no forgiveness in the timing for this one, so to make things easier for yourself, I'd recommend going straight for this trophy at the start of a round, and keep one of each aircraft colour in the air (letting the others land to keep some free airspace) until you have 3 different colour aircraft ready to land. To set up as closely as possible, I'd set them all up in front of their respective runways/helipads, and just draw a flight path to keep them circling in front of it. Then when you're ready, send them all straight in to land at the same time. This may take some practice, but you'll get it eventually. Once you get it right, the trophy will pop as they all land together.