The above map is not mine, it’s actually one from the internet. It was posted on Twitter by the CEO of Finnair Topi Manner. It shows the routing to Tokyo from Helsinki in 1986. The route took the McDonnell Douglas DC-10 over the North Pole as the airspace over the Soviet Union was only passable if you were stopping in Moscow.
Fast forward 36 years and Finnair is yet again flying this polar route. This old routing adds a few extra hours of flying time. Finnair knows its history and is also handing out polar crossing certificates.