What is the top speed of a commercial jet?

The top speed of a commercial jet typically ranges from 500 to 600 miles per hour (about 800 to 965 kilometers per hour) during cruise flight. For instance, the Boeing 747 has a maximum cruising speed of approximately 570 mph (917 km/h). However, some aircraft, like the Boeing 777 and Airbus A350, can go slightly faster, reaching speeds around 600 mph (965 km/h). Speed can vary based on factors such as aircraft type, weight, and weather conditions.