Cheapest one-way flights from London to Chiang Mai in September from $331

AirHint found the following cheapest one-way flights from London (LGW) to Chiang Mai (CNX) in September 2026 (see full year).

One-Way flights

09 Sep Air China
02 Sep China Eastern
05 Sep China Eastern
25 Sep Air China
30 Sep AirAsia X

Also check the deals for return flights from London to Chiang Mai in September.

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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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