Great question — answering as the UphillTech team:
There are two options, both roughly equidistant and neither an obvious winner: Japan is about 10 hours from Sydney, with direct flights to Tokyo. While snow is rare in Tokyo itself, there is tons of the white stuff anywhere in the Japan Alps (eg. Nagano), on the Japan Sea coast (eg. Kanazawa) and up in Hokkaido, where ski haven Niseko has become a virtual Aussie enclave. Japan is obviously not Christian, but Christmas is celebrated as a consumer holiday along the lines of Valentine's Day, with plenty of Christmas displays in shopping malls, Colonel Sanders decked out as Santa at KFC, etc. Korea is only a smidgen further away, with direct Sydney-Seoul flights also lasting around 10 hours....
Full answer by lambshaanxy: https://travel.stackexchange.com/a/61242 (CC BY-SA 3.0).
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