The Maximum is 41,000 ft don't know about cruising
The maximum crusie speed for a Boeing 767 is Mach 0.86
Cruising Speed Boeing 707 (currently out of production): 550 mph (885 km/h).
150 knots
The cruising speed of the Boeing 727-200 is 500 KTS (925 KM/H) at 40,00ft Service Ceiling.
The minimum speed of a Boeing 767 to remain in flight is about 160 miles per hour. Anything below that will cause the aircraft to begin to stall.
Depending on the exact type, the cruising speed is about 475 knots, or 545 miles per hour.
The Boeing 767-400ER is one of the varients of the Boeing 767. It is essentially a stretched Boeing 767-300ER. The "ER" bit stands for Extended Range.
A Boeing 767 has 3,100,000 parts.
914 km/h or 568 mph
The Boeing 767 has a cruising speed of approximately 530 to 590 miles per hour (850 to 950 kilometers per hour), depending on the specific model and flight conditions. Its maximum speed can reach around 600 miles per hour (965 kilometers per hour). This speed allows the aircraft to efficiently cover long distances, making it a popular choice for both passenger and cargo flights.
Boeing 767 is what i believe you are thinking of.