AirHint found the following cheapest return flights from Vancouver (YVR) to Chiang Mai (CNX) in September 2025 (see full year).

Return flights

24 Sep - 22 Oct	Philippine Airlines
25 Sep - 22 Oct	Philippine Airlines
30 Sep - 30 Oct	Philippine Airlines
29 Sep - 30 Oct	Philippine Airlines
30 Sep - 14 Oct	Philippine Airlines
30 Sep - 07 Oct	Philippine Airlines
30 Sep - 15 Oct	Philippine Airlines
26 Sep - 22 Oct	Philippine Airlines
27 Sep - 11 Oct	Philippine Airlines
24 Sep - 17 Oct	Philippine Airlines

Also check the deals for one-way flights from Vancouver to Chiang Mai in September.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Vancouver to Chiang Mai in September from $625

Return flights