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

Return flights

14 Oct - 28 Oct	AirAsia
15 Oct - 24 Oct	Air China
01 Oct - 15 Oct	Malaysia Airlines
02 Oct - 02 Nov	Scoot Tigerair
10 Oct - 22 Oct	Singapore Airlines
10 Oct - 21 Oct	Singapore Airlines
10 Oct - 20 Oct	Air China
10 Oct - 24 Oct	Singapore Airlines
13 Oct - 24 Oct	Singapore Airlines
02 Oct - 16 Oct	Singapore Airlines

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

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.

Book a cheap hotel in London

Cheap car rent in London

Cheapest return flights from Chiang Mai to London in October from 661€

Return flights