An airplane's liftoff speed, known as Vr (Rotation Speed), varies significantly based on its weight, air temperature, and altitude, but for most commercial jetliners in 2026, it is between 130 and 160 knots (150–185 mph). A massive Boeing 777-9, fully loaded with fuel and passengers, will require a higher speed (closer to 175 mph) compared to a lighter narrow-body like the Airbus A321neo. In contrast, smaller general aviation aircraft, such as a Cessna 172, can lift off at a much slower 55 to 65 knots (approx. 63–75 mph). This speed is critical because it represents the point where the wings generate enough lift to overcome the force of gravity (L>W). In 2026, flight computers calculate the exact Vr for every takeoff based on real-time runway conditions. If the air is thin (high altitude) or very hot, the plane must travel faster across the ground to achieve the necessary airspeed to fly. Once the pilot "rotates" the nose upward, the plane leaves the tarmac and begins its initial climb.