The flight from Mexico City (MEX) to London (LGW) takes about 9h 23m nonstop on a widebody airliner, covering 5,551 miles (8,934 km).
London is 7 hours ahead of Mexico City. You cross 7 time zones heading east. Eastbound trips like this one tend to be harder to adjust to, so plan for a day or two of jet lag.
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