By hijacking commercial airliners to fly into selected targets.
It’s 45,000 ft for commercial airliners
There is no certain cruising altitude for a commercial airline. it depends on where they are flying and how long they fly. most airlines fly above 10,000 ft. the max altitude is around 41,000 ft.
Most prop planes fly any where from 1,000-5,000 ft. Airliners usually fly from 10,000-20,000 ft. Military jets fly at pretty much any altitude
Planes can fly fifty feet off the ground if they need to. Commercial airliners fly in the stratosphere for two reasons: there's very little general aviation traffic up there (and most of the GA guys with planes who can fly that high are good pilots), and the plane is more efficient at that altitude.
The outside air temperature at 39,000 feet (a common altitude for jet airliners to fly) is about 45 degrees below zero.
Coast-to-coast on one tank of fuel? Most airliners can do it.
by flying
Well, it depends which airplane we are talking about. General aviation airplanes like the Cessna 172 normally fly below 10,000 feet unless there is a supply of oxygen for all on board. Jet liners on the other hand can fly up to 45000 feet. The supersonic Concorde could fly up to 60,000 feet. However, the vast majority of commercial airliners cruise between 30,000 and 35,000 feet.
Zero, if the jet plane is on the ground, otherwise it depends at what altitude the plane happens to be flying. Cruising altitude for many passenger airliners is around five to seven miles. Military aircraft often fly at much higher altitudes.
Yes. Many commercial flights exceed 40,000 feet in altitude.
Passenger planes can't fly at 55,000 feet. Gulfstream business jets can fly 51,000 feet altitude, and airliners like to cruise at 35,000 feet. Some military planes, like the U-2, can fly at 55,000 feet or greater.