impossible to tell because every jet is different
Different fighter planes have different capabilities, but somewhere between Mach 1 (the speed of sound) and Mach 3 (three times the speed of sound) has been the general norm for fighter planes in the last five decades. Fighter-bombers are capable of supersonic speeds above Mach 1, but fighter-interceptors can do about Mach 2.5.
Mach 2.5
The Mustang Mach I will reach speeds in excess of 105.5-mph. The Mach I will accelerate to 105-mph in 13.13-seconds. It is faster than the SS Camaro.
Mach 1.5
Mach 1.8 (1200mph)
Mach 1.8 (1200mph)
The "Mach number" is the speed of the aircraft as a percentage of the speed of sound. So an aircraft going at Mach 0.74 is traveling at 74% of the speed of sound. (Mach 0.74 is a typical airliner speed.)
Faster than Mach 2.5 (1.650+ mph or 2,600+ km/h)
According to the Encyclopedia of World Air Power the fastest fighter jet is, The F15: Mach 2.5, approximately 1,400 mph.
No it is an advanced, long range, Mach 3+ strategic reconnaissance aircraft.
The F-22 can hit almost mach 3 I believe
It varies for different models and is typically classified information. A good estimate is about mach 1.8, but a few might be able to exceed mach 2.