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The answer to this is actually fairly complex--it depends on factors like how high the plane is flying and how strong the winds are up there. But the short, simplified answer is that jet airliners, when at cruise altitude, are flying at about 550 mph over the ground. In reality, this varies greatly because of head or tailwinds caused by jet streams in the atmosphere. Westbount flights often fight headwinds while eastbound flights typically get "following winds".

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15y ago

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