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Name: David J.
Status: educator
Age: 20s
Location: N/A
Country: N/A
Date: 2001

What is the normal and maximum altitude that a commercial airline will fly? I have heard that Boeing 777's have flown at altitudes of around 40,000 ft. and wondered if this was possible for a commercial aircraft to fly at this altitude.

Yes they fly at that and a little higher.

Peter Faletra Ph.D.
Senior Science Advisor
Office of Science
Department of Energy

Maximum altitude flown by over the US by commercial aircraft is 45,000 feet. Not all aircraft (e.g. B737) are capable of this altitude. Airlines calculate the most economical - based on winds - altitude and request such. The military may fly higher, but they are reluctant to say to what altitude.

Larry Kengel

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