London _new York
Join Date: Jul 2002
Location: California USA
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I make the great circle mileage between JFK and Heathrow to be about 3450 miles. How long it takes depends, of course, on how fast you're travelling. An average ground speed of 500 kts would mean about 6 hours. An average ground speed of 70 kts would mean about 43 hours. An average ground speed of 8000 kts would mean about 22 minutes. 
Dave
Dave
Join Date: Dec 1998
Location: Box suspended over the Thames
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Join Date: Sep 2002
Location: London, UK
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