Do Planes Fly in the Ionosphere?

The ionosphere is particularly important to these flights. While they are over the Arctic, planes lose contact with most geosynchronous satellites and must rely on "old-fashioned" radio communications, a link that could be severed during a radio blackout.

What sphere do airplanes fly in?

Commercial jet aircraft fly in the lower stratosphere to avoid the turbulence which is common in the troposphere below. The stratosphere is very dry; air there contains little water vapor. Because of this, few clouds are found in this layer; almost all clouds occur in the lower, more humid troposphere.

What are 3 facts about the ionosphere?