AirHint found the following cheapest return flights from Hanoi (HAN) to London (LGW) in December 2025 (see full year).

Return flights

20 Dec - 03 Jan	Air China
21 Dec - 04 Jan	Air China
13 Dec - 01 Jan	Air China
14 Dec - 02 Jan	Air China
15 Dec - 03 Jan	Air China
20 Dec - 04 Jan	Air China
20 Dec - 08 Jan	Air China
18 Dec - 03 Jan	Air China
29 Dec - 05 Jan	Air China
19 Dec - 31 Dec	Air China
16 Dec - 30 Dec	Air China
15 Dec - 02 Jan	Air China
08 Dec - 10 Dec	Turkish Airlines
21 Dec - 24 Dec	Air China
13 Dec - 31 Dec	Air China
19 Dec - 28 Dec	China Eastern
14 Dec - 28 Dec	China Eastern
17 Dec - 31 Dec	Air China
08 Dec - 21 Dec	Air China
13 Dec - 21 Dec	Air China

Also check the deals for one-way flights from Hanoi 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 Hanoi to London in December from 548€

Return flights