I know/knew some people from India -- including from South India, some of who were routinely considered to be "black" by many Americans and some Eurpoeans -- who came to the US or went to/via Europe in the 1930s to 1960s. Some of those trips (especially in the 1950s-1960s) were on flights and there wasn't segregation on the international flights they were on. If they paid, they flew and felt treated as well as the others on the flights. Money talks.