Planes flying eastward (including northeast and southeast) will fly at odd altitudes (i.e. 35,000 feet) and all other directions will fly at even altitudes.

How high do planes fly? Commercial planes fly between 35,000ft and 42,000ft these days which is around 6.6 miles up in the air. But if they go too high it wouldn’t be good for anyone on board.

How high do commercial planes fly? On average, commercial airliners cruise between 31,000 and 42,000 feet (5.9 to 7.2 miles) above sea level.

Let's break down the physics of how planes fly, starting with how a wing works. Fasten your seatbelt, and prepare to learn all about lift.

Why do planes fly so high? It’s not just to avoid mountains, clouds, or turbulence. The main reason is air density. At high altitudes, the air is thinner, which means less drag and better fuel ...

Commercial planes fill the skies carrying passengers and cargo. How fast do they typically fly, and what are the maximum speeds of various aircraft?

If you've ever wondered how massive airplanes — which can weigh more than 661 tons — stay up in the air, you're not alone. But it's not magic that keeps airplanes aloft.

But how exactly do airplanes fly? Flight requires two things: thrust and lift. Thrust is the forward motion provided by a propeller or jet engine. (A propeller, by the way, uses the same ...

Pilot John Cox explains the maximum altitude for airlines and how limits are determined.

1 Commercial planes fly between 35,000 and 42,000 feet Credit: Getty How high do planes fly? Commercial planes fly upwards of 6.6 miles up in the air - which is between 35,000 and 42,000 feet.

1 Commercial planes fly between 35,000 and 42,000 feet Credit: Getty How high do planes fly? Commercial planes fly upwards of 6.6 miles up in the air - which is between 35,000 and 42,000 feet.