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

Return flights

22 Sep - 06 Oct	Hainan Airlines
26 Sep - 06 Oct	Hainan Airlines
22 Sep - 19 Oct	Hainan Airlines
26 Sep - 17 Oct	Hainan Airlines
26 Sep - 12 Oct	Hainan Airlines
24 Sep - 05 Oct	Hainan Airlines
26 Sep - 08 Oct	Hainan Airlines
05 Sep - 12 Oct	Hainan Airlines
15 Sep - 06 Oct	Hainan Airlines
01 Sep - 08 Sep	Hainan Airlines
26 Sep - 19 Oct	Hainan Airlines
12 Sep - 20 Sep	Tianjin Airlines
14 Sep - 25 Sep	Tianjin Airlines
05 Sep - 08 Sep	Hainan Airlines
05 Sep - 11 Sep	KLM
05 Sep - 09 Sep	KLM
08 Sep - 16 Sep	KLM
02 Sep - 11 Sep	Air France
02 Sep - 16 Sep	Air France
06 Sep - 16 Sep	Air France

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 $544

Return flights