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Definitely read the Wikipost at the top of the page on
HELP DESK: MileSAAver / SAAver award questions, assistance.
Also Check the innosked interactive map and schedule tool to see which airlines go to DPS. Cathay / Cathay Dragon are logical, but Malaysia via KUL, etc. are worth a look. And one can book to HKG and go onward to
DOS DPS - I’d recommend an overnight at HKG on separate tickets - on LCCs (Hong Kong Airlines, etc.)