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

Return flights

22 Sep - 29 Sep	Cathay Pacific
23 Sep - 30 Sep	Cathay Pacific
21 Sep - 28 Sep	Thai Airways
30 Sep - 12 Oct	Air Astana
20 Sep - 28 Sep	Shenzhen Airlines
30 Sep - 06 Oct	Hainan Airlines
28 Sep - 06 Oct	Hainan Airlines
29 Sep - 06 Oct	Hainan Airlines
25 Sep - 04 Oct	Shenzhen Airlines
25 Sep - 08 Oct	Shenzhen Airlines
27 Sep - 04 Oct	Air China
28 Sep - 05 Oct	Air China
28 Sep - 04 Oct	Air China
19 Sep - 20 Sep	Cathay Pacific
20 Sep - 21 Sep	Vietnam Airlines
29 Sep - 08 Oct	Hainan Airlines
22 Sep - 29 Sep	Air China	direct
21 Sep - 28 Sep	Air China	direct
20 Sep - 28 Sep	Air China	direct
19 Sep - 20 Sep	Air China	direct

Also check the deals for one-way flights from Beijing to London 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 Beijing to London in September from 828€

Return flights