Much thought is still taking place about the exact route. It would be apt to follow Wiley Post, the first solo circumnavigation. He left Los Angeles and crossed the Atlantic via Greenland and Iceland before putting down at Chester UK. From there he went to Hamburg and Berlin and on to Moscow. A west to east route directly across Russia took him to the Pacific and into Alaska. Transit through Canada followed by a landing in Los Angeles completed the journey. Political considerations today rule out that journey through Russia.
He visited major airports along the route, but major airports in the thirties were not like todays major airports. The pilots of the ATWA80 flight would not want to mix it with today’s airliners arriving and departing at two per minute. Smaller regional airports offer the best solution and the flavour of the country being visited.