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

Return flights

23 Dec - 19 Jan	China Eastern
23 Dec - 31 Dec	China Eastern
18 Dec - 31 Dec	China Eastern
26 Dec - 05 Jan	China Eastern
18 Dec - 23 Jan	China Eastern
06 Dec - 10 Jan	China Eastern
26 Dec - 19 Jan	China Eastern
12 Dec - 05 Jan	China Eastern
14 Dec - 07 Jan	China Eastern
21 Dec - 05 Jan	China Eastern
21 Dec - 04 Jan	China Eastern
24 Dec - 02 Jan	Thai AirAsia
19 Dec - 23 Dec	Air China
18 Dec - 29 Dec	Air China
27 Dec - 30 Dec	Air China
21 Dec - 29 Dec	Air China
01 Dec - 07 Dec	Air China
13 Dec - 29 Dec	Air China
13 Dec - 27 Dec	Thai AirAsia
12 Dec - 22 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 435€

Return flights