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	SWISS
04 Sep - 12 Sep	China Eastern
07 Sep - 14 Sep	China Eastern
11 Sep - 21 Sep	China Eastern
14 Sep - 24 Sep	China Eastern
14 Sep - 23 Sep	China Eastern
15 Sep - 24 Sep	SWISS
08 Sep - 17 Sep	China Eastern
18 Sep - 20 Sep	IndiGo
17 Sep - 24 Sep	China Eastern
12 Sep - 20 Oct	Air China
07 Sep - 27 Oct	China Eastern
11 Sep - 25 Oct	Air China
25 Sep - 13 Oct	Emirates
18 Sep - 01 Oct	Emirates
22 Sep - 03 Oct	Emirates
21 Sep - 03 Oct	Emirates
17 Sep - 02 Oct	Emirates
18 Sep - 02 Oct	Emirates
17 Sep - 03 Oct	Emirates

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 $622

Return flights