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

Return flights

18 Jun - 25 Jun	AirAsia
21 Jun - 23 Jun	Air China
14 Jun - 21 Jun	Cathay Pacific
30 Jun - 10 Jul	Asiana Airlines
22 Jun - 29 Jun	Thai Airways
25 Jun - 30 Jul	Thai Airways

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

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 Chiang Mai to London in June from $820

Return flights