The total carbon emissions for a flight from London, United Kingdom to Moscow, Russia is 721 lbs CO2.
This is equivalent to 327 kg CO2e or 0.33 tonnes of carbon dioxide equivalents.
With radiative forcing in effect, the carbon emissions may increase by 2.7 times, so the CO2 equivalents would then be 1,947 pounds, equivalent to 883 kilograms or 0.88 metric tonnes.
These calculations are based on the distance from London, United Kingdom to Moscow, Russia which is 1,558 miles or 2,508 kilometers.
This trip is a short haul international flight. The calculation includes an assumption of a 65% load factor with 139 seats.