Asphalt 8: Airborne

This achievement is unlocked for having a total flight time of 10 minutes. The game measures this in seconds and so is equal to 600 seconds. Most jumps will give you anywhere between 0.5s and 2s. This is a total of 300-1200 jumps. The Tokyo level has a number of large jumps which can give you anywhere from 1s – 3s jumps. The best I have ever managed to pull off was a 7.6s jump in one of the later stages. This should pop around the 3.5 hour mark.