Why Does A Plane Look And Feel Like It’s Moving More Slowly Than It Actually Is?

Without a point of reference, it can be hard to tell just how fast an airplane is traveling.

By Sara Nelson, Iowa State University
Sep 29, 2023 3:00 PM
airplane in the sky
(Credit:watin/Shutterstock)

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A passenger jet flies at about 575 mph once it’s at cruising altitude. That’s nearly nine times faster than a car might typically be cruising on the highway. So why does a plane in flight look like it’s just inching across the sky?

I am an aerospace educator who relies on the laws of physics when teaching about aircraft. These same principles of physics help explain why looks can be deceiving when it comes to how fast an object is moving.

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