Typical Flight Profile
Here is a typical flight profile for a Boeing 757/767 airliner flying from New York City to Los Angeles, California. The speeds are provided as the flight crew plans. They are then converted to miles per hour -- mph. Speed calculations are based on the Boeing 757-200 aircraft with a takeoff weight of 220,100 pounds. Knots used here means knots indicated airspeed -- KIAS.
Takeoff is at 152 knots -- 175 mph.
Climb out is at 167 knots -- 192 mph -- until 1,000. Speed is increased to 250 knots -- 288 mph -- until 10,000 then climbing speed is 300 knots -- 345 mph until cruise mach is attained.
Cruise is at 0.78 to 0.79 mach depending on the fuel consumption rate. Mach is the speed of sound and varies by altitude, temperature and air density. At 35,000 feet altitude, mach 1 is 663.5 mph for standard conditions. It is a few mph faster for lower altitudes and a few mph slower for higher altitudes. For standard conditions in the 33,000 to 39,000 typical cruise altitude, 0.78 to 0.79 mach would be 515 to 525 mph.
Descent from cruise altitude is at cruise mach until indicated airspeed hits 300 kts. Descent continues at that speed until air traffic control directs speed changes for orderly traffic flow. Landing speed for the Boeing 757, know weighing 187,200 pounds is 126 knots -- 145 mph.