At the controls of the twin-engine supersonic plane, Adams flew from London to Los Angeles in a blistering 3 hours, 47 minutes and 39 seconds.
I wonder if he flew a polar route, because going west to east is usually faster due to winds.
The shortest route from London to Los Angeles goes over southern Greenland, Hudson’s Bay, and then southwest across the western United States (5456 mi) - Average speed: 1438 mph.
He wod have flown a great circle route, which is a straight line on a globe. London to LA wouldn’t be polar,but it would go a bit over Greenland
Above 60,000 feet there are no winds.