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Yes. Bangkok Airways flies nonstop from Chiang Mai (CNX) to Na Thon (USM). The flight takes about 1h 49m and covers 641 miles (1,032 km).
Bangkok Airways operates nonstop flights from Chiang Mai to Na Thon.
The nonstop flight from Chiang Mai to Na Thon takes ~1h 49m (approximately 1032 km).