Airplanes fly in what layer of the atmosphere?

Question:- Airplanes fly in what layer of the atmosphere?

Answer: Troposphere

Airplanes mainly operate in the troposphere which is the first layer in the Earth’s atmosphere. Ranging from the Earth’s surface up to approximately 10-12km (6-7 miles) in the middle and lower latitudes, the troposphere is where most weather processes take place. This layer is where about 75-80% of the mass of the atmosphere and virtually 100% of the water vapour is found. The troposphere’s characteristics make it ideal for aviation: Yes, the earth’s atmosphere has enough mass or air density to create the all-important lift for the wings of aircraft and the atmospheric conditions are quite stable for real efficiency. Although there are some rare aeroplanes which can fly down to the stratosphere, commercial aircraft generally fly at an altitude of 9-12 km, at which point they are still in the troposphere. The given layer’s characteristics supply the conditions required for secure and efficient air transport, which as such remains the main domain of aviation operations.