what is the highest flying jet
Learjet 75. The Learjet 75 business jet, with a maximum operating ceiling of 51,000ft, is one of the highest altitude passenger planes available. The aircraft is manufactured by Bombardier Aerospace. The Learjet 75 avoids delays due to congestion at low altitudes by flying at over-the-weather altitudes.
Gulfstream G650. The Gulfstream G650, with a maximum cruise ceiling of 51,000ft, is one of the highest altitude passenger planes in the world. It is the largest and fastest business jet built by Gulfstream Aerospace. The Gulfstream G650 was released into the market in 2008.