Why are some flights faster than others?

They don't all fly at the same speed. Four-engined planes are slightly faster than two-engined planes. Cruising speed also depends on altitude. Another reason might be that night flights get routed a longer way in and out of airports due to noise abatement factors.



Flight durations are primarily influenced by the Jet Stream, high-altitude "rivers" of wind that flow from west to east. When a plane flies east (e.g., NYC to London), it hitches a ride on these tailwinds, which can add over 100 mph to the ground speed, significantly shortening the trip. Conversely, flying west means fighting "headwinds," which slow the plane down and increase fuel consumption. In 2026, flight planners also use AI-driven route optimization to avoid bad weather or restricted airspaces, which can add miles to a journey. Furthermore, different aircraft have different "cruising speeds"; for instance, a Boeing 747-8 or 787 generally cruises faster than a smaller A320. Finally, "schedule padding" by airlines also plays a role; an airline might list a flight as longer than it actually is to ensure a high "on-time" percentage even if there are minor ground delays, making one carrier's flight appear "slower" than another's on paper.

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In jet aircraft, an overspeed results when the axial compressor exceeds its maximal operating rotational speed. This often leads to the mechanical failure of turbine blades, flameout and total destruction of the engine.

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The answer is around 500 mph in still air. Jets often cruise near their maximum speed; in those cases they cannot speed up without exceeding limitations. Exceeding a limitation is unsafe and is contrary to the regulations.

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What is the longest flight in the world by distance? The longest flight in the world by distance is New York (JFK) to Singapore (SIN) on Singapore Airlines clocking in at 9,537 miles. What plane can fly the farthest in the world?

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It's been established that the Pacific Ocean is big ... really big. And with greater distances come greater costs since the plane needs more fuel. Executive Flyers writes that while you could just charge passengers more to fly that distance, this may lead to lots of unhappy customers and airlines losing out on sales.

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Because the Earth is a three-dimensional sphere and not merely a two-dimensional flat, East-West surface. Because of this spherical shape, often times the shortest distance is flying more north and south, up over the Northern latitudes and the North Pole, rather than flying east/west over the Pacific.

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The Indicated Airspeed (IAS) is about the same, regardless of weight, however a lower weight allows for higher cruise altitudes and therefore higher True Airspeed (TAS - true airspeed is the actual speed of the aircraft in a body of air and increases about 2% per 1000 feet higher altitude at any constant indicated ...

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There is no significant difference. Cruise Speeds (and Mach number limitations) can vary depending on the temperature of the air and other factors, but the actual effect on the speed of the aircraft (in cruise) is usually very small.

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The North American X-15 may be the fastest plane in the world, with speeds at 4,520 mph and Mach 5.93. It's an experimental aircraft used and powered by NASA and USAF.

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The simple answer is yes, pilots do, and are allowed to sleep during flight but there are strict rules controlling this practice. Pilots would only normally sleep on long haul flights, although sleep on short haul flights is permitted to avoid the effects of fatigue.

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Theoretically it is possible but even a supersonic jet would be hindered by factors such as speed restrictions and in-flight refuelling.

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A headwind will reduce the ground speed needed for takeoff, as there is a greater flow of air over the wings. Typical takeoff air speeds for jetliners are in the range of 240–285 km/h (130–154 kn; 149–177 mph). Light aircraft, such as a Cessna 150, take off at around 100 km/h (54 kn; 62 mph).

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What's the slowest a plane can fly? The Ruppert Archaeopteryx has a certified stall speed of 30–39 kilometres per hour (19–24 mph). The Vought XF5U can fly as slow as 32 kilometres per hour (20 mph). The Tapanee Pegazair-100 stall speed is 45 kilometres per hour (28 mph).

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According to FAR 91.117(a), unless otherwise authorized by the Administrator, no person may operate an aircraft below 10,000 feet MSL at an indicated airspeed of more than 250 knots (288 mph). If you're flying a piston aircraft, this might not mean a lot to you. However, it's an important factor for turbine aircraft.

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