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

Return flights

16 Sep - 23 Sep	Air China
20 Sep - 24 Sep	China Eastern
12 Sep - 15 Sep	China Eastern
15 Sep - 22 Sep	China Eastern
12 Sep - 17 Sep	China Eastern
09 Sep - 21 Sep	China Eastern
14 Sep - 22 Sep	China Eastern
24 Sep - 29 Sep	SWISS
25 Sep - 21 Oct	IndiGo
15 Sep - 29 Sep	SWISS
24 Sep - 30 Sep	SWISS
25 Sep - 27 Oct	IndiGo
25 Sep - 20 Oct	IndiGo
16 Sep - 01 Oct	Lufthansa
17 Sep - 01 Oct	Air China
25 Sep - 13 Oct	IndiGo
25 Sep - 25 Oct	IndiGo
07 Sep - 26 Oct	China Eastern
14 Sep - 12 Oct	Air China
25 Sep - 14 Oct	IndiGo

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 530€

Return flights