How high do airplanes fly?

Small private planes fly at 12,000 feet maximum. Passenger airliners fly from 32,000 to 40,000 feet. The Concorde super-sonic transport cruised at Mach 2 at 57,000 feet.
Small private planes fly at 12,000 feet maximum.

Passenger airliners fly from 32,000 to 40,000 feet.

The Concorde super-sonic transport cruised at Mach 2 at 57,000 feet.

Typical jet liners fly around 25,000 to 45,000 feet. Miltary fighters get up to 80,000 feet, some specialty planes such as The U2 spy plane and the SR-71 are thought to go as high as 120,000 feet. the x-15 has a ceiling of 354,000 feet

I guess you could count the space shuttle and space ship one as "planes" since it is powered and does glide so it would have a limitless range.