This article [1] indicates that they burn up at altitudes between 37-50 miles above the surface. If so, that's well above the 40,000' that planes normally fly.

This article [1] indicates that they burn up at altitudes between 37-50 miles above the surface. If so, that's well above the 40,000' that planes normally fly. [1] https://www.space.com/spacex-starlink-reentry-pollution-damage-earth-atmosphere https://www.space.com/spacex-starlink-reentry-pollution-dama...