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

Return flights

22 Sep - 19 Oct	Hainan Airlines
12 Sep - 22 Oct	Hainan Airlines
12 Sep - 12 Oct	Hainan Airlines
10 Sep - 10 Oct	Hainan Airlines
05 Sep - 05 Oct	Hainan Airlines
10 Sep - 09 Oct	Hainan Airlines
16 Sep - 22 Oct	KLM
17 Sep - 07 Oct	KLM
15 Sep - 30 Oct	KLM
20 Sep - 05 Oct	Air France
01 Sep - 08 Sep	Hainan Airlines
08 Sep - 24 Sep	Hainan Airlines
01 Sep - 10 Sep	Hainan Airlines
03 Sep - 10 Sep	Hainan Airlines
10 Sep - 24 Sep	Hainan Airlines
10 Sep - 17 Sep	Hainan Airlines
17 Sep - 24 Sep	Hainan Airlines
04 Sep - 11 Sep	KLM
08 Sep - 11 Sep	Hainan Airlines
08 Sep - 14 Sep	Hainan Airlines

Also check the deals for one-way flights from London to Beijing 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 Beijing in September from $572

Return flights