Stratosphere
2200 mph
The SR-71 Blackbird primarily operated in the stratosphere, which is the second major layer of Earth's atmosphere. This layer is characterized by high altitudes, low air pressure, and stable atmospheric conditions - ideal for high-speed, high-altitude flight capabilities of the SR-71.
SR71 Blackbird Model M-21: maximum speed: 2211miles/h Generally, the given answer for all models of the SR71 is: "In excess of Mach 3", or more than three times the speed of sound. see related links below for more info
In 1990 the SR-71 went from the West Coast to the East Coast in 68 minutes and 17 seconds. That's as close as I could get to Los Angeles to New York.
Over 85,000 feet.
they fly on and on on and on on and on on and on on and on on and on on and on on and on! they fly forever!
High
The Blackbird
The SR-71 Blackbird can fly way much more higher than Missiles. So the SR-71 Blackbird win.
Mach 3.5 about 2600 mph
They can fly at over Mach 3.5 .