Cheapest return flights from Chiang Mai to London in September from $1291

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

Return flights

24 Sep - 01 Oct Singapore Airlines
26 Sep - 03 Oct Qatar Airways
02 Sep - 06 Sep Qatar Airways

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

Skyscanner

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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