How fast can a Boeing 777 go?

A Boeing 777 can read a maximum cruise speed of Mach 0.89 (512 KIAS) at a cruise altitude of FL350.

Normal Cruise Speed of a Boeing 777

Mach 0.84 (560 mph, 905 km/h, 490 knots) at an attitude of 35,000 ft (11,000 mtrs)

Maximum Cruise Speed of a Boeing 777

Mach 0.89 (590 mph, 950 km/h, 512 knots) at an attitude of 35,000 ft (11,000 mtrs)