The Boeing 777 is one of the fastest long-haul commercial airliners in the sky. Its typical cruising speed is Mach 0.84, which translates to approximately 560 miles per hour (900 km/h) at a standard cruising altitude of 35,000 feet. The maximum cruise speed can reach up to Mach 0.89 (roughly 600 mph) if the pilots need to make up time or are assisted by a strong tailwind. This high-speed performance is powered by massive engines like the General Electric GE90-115B—the most powerful jet engine in history until the arrival of the 777X’s GE9X. Because of its speed and efficiency, the 777 is the preferred choice for "ultra-long-haul" flights, such as those connecting London to Singapore or New York to Dubai, allowing it to shave precious hours off transoceanic journeys compared to older, slower widebody jets.