to take people were they need to go and so they wont hit houses and other things.
most commercial airplanes fly from 35,000 feet to 45,000 feet above sea level.
hyuikk465
Anywhere from just above ground level to 1000 feet.
I think the maximum flight level for commercial passenger airliners is 41,000 feet.That's 12.5 kilometers above sea level.The altitude above the ground depends on how high the ground is.The highest ground on earth is the peak of Mt. Everest, about 8.9 km above sea level.So the maximum flight level for a passenger jet is about 3.6 km higher than the highestpoint on the ground.
All commercial aircraft can fly low. That is how they line up for a landing . However, each type has a minimums factor of which is it speed and staff. If the pilot maintains these they can fly at low levels but doing so can cause high fuel burn, potential ground strike, hazard building factors including high reach cranes and towers
up to 60 mph. they can fly as high as 1000 feet above the ground
Most fly between 30,000 and 50,000 feet.
Where air planes fly, the temperature is below freezing.
Airplanes dont fly in the stratosphere because they produce too much sound. This may cause noise pollution and stress among people who are on the ground. So they dont fly in the Troposphere.
In order to fly, airplanes use aerofoil-shaped wings. An aerofoil is a shape that forms higher pressure beneath than above, pushing the plane up. The engine helps to accelerate the aircraft to a high enough speed to overcome gravity.
Jet airplanes fly at high altitudes because it is more fuel efficient. Flying at higher altitudes uses less fuel than flying at lower altitudes.
Asside fro a few spy planes, Very few airplanes can fly in thestratosphere because the air is so thin that there is not enough lift to keep up .