Military jets can vary widely in speed depending on the type and model. For instance, fighter jets like the F-22 Raptor can reach speeds of around 1,500 miles per hour (2,414 kilometers per hour) or Mach 2.25. Other jets, such as the supersonic B-1B Lancer, can also fly at similar speeds. Generally, most military jets are designed to exceed the speed of sound, with many capable of reaching Mach 1 or higher.
The military says Mach 3 (three times the speed of sound) but it can go way faster.
very fast
There is no such thing as a jet train.
most military air combat jet aircraft can go over mach 1.0, passenger aircraft fly at around mach 0.80
about 40mph
400
It depends on the jet or aircraft you are refering too some go into our atmosphere
I think it's the SR-71 "Blackbird" but it is out of commission
9500 mph
366mph (516kph)
250 mile
Go over MACH 1. Preferably in a military jet.