AirHint found the following cheapest return flights from London (LHR) to Chengdu (CTU) in September 2025 (see full year).

Return flights

28 Sep - 28 Oct	China Southern
30 Sep - 18 Oct	China Southern
30 Sep - 07 Oct	China Southern
30 Sep - 11 Oct	China Southern
28 Sep - 11 Oct	China Southern
27 Sep - 15 Oct	Shenzhen Airlines
29 Sep - 09 Oct	Shenzhen Airlines
29 Sep - 06 Oct	Shenzhen Airlines
27 Sep - 06 Oct	China Southern
23 Sep - 18 Oct	China Southern
24 Sep - 30 Sep	China Southern
27 Sep - 30 Sep	China Southern
24 Sep - 29 Sep	Air India
27 Sep - 30 Sep	Air China	direct

Also check the deals for one-way flights from London to Chengdu 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 London to Chengdu in September from 405€

Return flights