that was kind of my point, although better if the Soviets still in collaboration an Arctic route could have been used?
from Graf Zeppelin around the world flight
"Friedrichshafen – Tokyo
August 15, 1929 – August 19, 1929
11,247 km / 101 hrs 49 mins"
(that flight was over Soviet territory, not Northeast Passage, which from Norway would be shorter trip)
Germany made a few test flights between Europe & Manchuria. How many depends on who you believe. Perhaps as many as a dozen were planned and six attempted. maybe fewer. Refueling was accomplished at varying points, mostly in Afganistan. The Soviets claimed they destroyed one refueling site in a commando raid, causing the flight to be aborted.
Similar cargo flights to South America were planned, but I cant recall if any were attempted. By the end of 1942 ther ewere few desitnations and fewer refuel points.
It is claimed Japan attempted one carg/recon flight to Germany. It was to have been launched from Singapore, & failed to show at its refuel point in Afganistan.