Normal planes go at 40,500 feet from ground.
Planes fly high to get above the weather, and to avoid air traffic. For jet planes, certain altitudes, all quite high, afford more efficient flight conditions.
30000
Around 11km
They can fly but they have a high chance of getting damaged.
If they are in the air so the answer is no, because if planes fly at high altitude and at high speed. It makes it alot difficult to get planes shot down.
High-speed fighter planes have aerofoil-shaped wings.
Pressurization keeps the people alive.
M.I.A. Paper Planes Fly like paper get high like planes
Of course, planes can fly.
I said it is a Astronomer
A large jet can get over 12 Kilometers
The heights model aircraft fly is really only governed by how far their controllers can see. In theory they can fly thousand of meters high.