Originally Posted by NoWindowSeat
This is good the get a commonly understood confirmation for this "transiting through the country of origin once you've left it" -issue as there recently was a thread about longest routings and one of them included multiple international arrivals into HKG (which was the origin) and nobody mentioned anything being wrong with it...
Sorry - I must have missed that. Transit through the city of origin is allowed, but once you are back in the country of origin you cannot leave it again (with the exceptions of travel within US/Canada, and the Scandinavian countries each being regarded as non-international). So this is only really useful for tickets originating in those two regions or Australia or Spain or the UK (those being the only countries with significant domestic OneWorld networks).