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

Return flights

07 Dec - 07 Jan	SWISS
15 Dec - 10 Jan	Lufthansa
01 Dec - 15 Jan	Lufthansa
10 Dec - 08 Jan	Lufthansa
10 Dec - 07 Jan	Lufthansa
27 Dec - 17 Jan	Lufthansa
27 Dec - 11 Jan	Lufthansa
25 Dec - 07 Jan	Royal Brunei
25 Dec - 02 Jan	Royal Brunei
17 Dec - 07 Jan	KLM
02 Dec - 09 Dec	Air France
04 Dec - 08 Dec	Air France
02 Dec - 08 Dec	Air France
01 Dec - 06 Dec	Air China
15 Dec - 23 Dec	Air China
04 Dec - 13 Dec	Air China
14 Dec - 20 Dec	Air China
11 Dec - 20 Dec	Air China
12 Dec - 20 Dec	Air China
12 Dec - 23 Dec	Air China

Also check the deals for one-way flights from Hong Kong to London in December.

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 December from $558

Return flights