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

Return flights

28 Sep - 05 Oct	China Eastern
29 Sep - 05 Oct	China Eastern
25 Sep - 02 Oct	HK Express
28 Sep - 04 Oct	China Eastern
16 Sep - 23 Sep	Air China
24 Sep - 28 Sep	Greater Bay Airlines
29 Sep - 27 Oct	China Eastern
29 Sep - 03 Oct	China Eastern
24 Sep - 03 Oct	Greater Bay Airlines
24 Sep - 30 Sep	Greater Bay Airlines
23 Sep - 02 Oct	HK Express
23 Sep - 04 Oct	HK Express
24 Sep - 01 Oct	China Eastern
16 Sep - 25 Sep	Air China
17 Sep - 26 Sep	HK Express
25 Sep - 29 Sep	Cathay Pacific
17 Sep - 24 Sep	Air China
24 Sep - 29 Sep	China Eastern
18 Sep - 21 Sep	HK Express
18 Sep - 23 Sep	HK Express

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 539€

Return flights