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

Return flights

23 Sep - 21 Oct	Turkish Airlines
17 Sep - 24 Sep	Lufthansa
15 Sep - 22 Sep	Lufthansa
18 Sep - 24 Sep	Royal Brunei
15 Sep - 19 Sep	Finnair
22 Sep - 26 Sep	Finnair
16 Sep - 23 Sep	Finnair
17 Sep - 28 Oct	Lufthansa
17 Sep - 21 Sep	KLM
10 Sep - 17 Sep	Air France
18 Sep - 23 Sep	Air France
18 Sep - 25 Sep	Air France
23 Sep - 02 Oct	Turkish Airlines
23 Sep - 30 Oct	Finnair
25 Sep - 08 Oct	Royal Brunei
18 Sep - 15 Oct	Royal Brunei
18 Sep - 17 Oct	Royal Brunei
18 Sep - 08 Oct	Royal Brunei
23 Sep - 04 Oct	Lufthansa
25 Sep - 10 Oct	Royal Brunei

Also check the deals for one-way flights from Hong Kong 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 Hong Kong to London in September from $611

Return flights