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

Return flights

05 Sep - 14 Sep	China Eastern
05 Sep - 16 Sep	China Eastern
10 Sep - 17 Sep	KLM
18 Sep - 27 Sep	Air China
10 Sep - 24 Sep	KLM
15 Sep - 22 Sep	China Eastern
16 Sep - 30 Sep	Lufthansa
18 Sep - 25 Sep	Finnair
25 Sep - 29 Sep	IndiGo
15 Sep - 23 Sep	Finnair
21 Sep - 13 Oct	China Eastern
17 Sep - 01 Oct	KLM
18 Sep - 15 Oct	IndiGo
23 Sep - 14 Oct	Scoot Tigerair
07 Sep - 02 Oct	China Eastern
23 Sep - 05 Oct	Scoot Tigerair
21 Sep - 08 Oct	China Eastern
21 Sep - 06 Oct	China Eastern
07 Sep - 14 Oct	China Eastern
05 Sep - 05 Oct	China Eastern

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 471€

Return flights