AirHint found the following cheapest return flights from Hong Kong (HKG) to London (LHR) in September 2026 (see full year).

Return flights

16 Sep - 06 Oct	Finnair
16 Sep - 30 Sep	Finnair
15 Sep - 30 Sep	Finnair
17 Sep - 30 Sep	Finnair
29 Sep - 12 Oct	Finnair
17 Sep - 24 Sep	Finnair
24 Sep - 08 Oct	Finnair
16 Sep - 24 Sep	Finnair
25 Sep - 06 Oct	Finnair
09 Sep - 16 Sep	Finnair
08 Sep - 15 Sep	Lufthansa
01 Sep - 08 Sep	Finnair
02 Sep - 09 Sep	Finnair
17 Sep - 25 Sep	Finnair
01 Sep - 07 Oct	Finnair
25 Sep - 08 Oct	Finnair
17 Sep - 03 Oct	Finnair
25 Sep - 02 Oct	Finnair
01 Sep - 07 Oct	British Airways	direct
25 Sep - 08 Oct	British Airways	direct

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 $661

Return flights