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

Return flights

29 Dec - 04 Jan	Air China
24 Dec - 04 Jan	Air China
14 Dec - 07 Jan	Air China
08 Dec - 05 Jan	Air China
20 Dec - 30 Dec	Air China
16 Dec - 31 Dec	Air China
12 Dec - 04 Jan	Air China
13 Dec - 05 Jan	Air China
10 Dec - 04 Jan	Air China
14 Dec - 29 Dec	Air China
22 Dec - 02 Jan	Air China
17 Dec - 24 Dec	Thai AirAsia
19 Dec - 05 Jan	Air China
10 Dec - 24 Dec	Air China
08 Dec - 14 Dec	Air China
20 Dec - 23 Dec	British Airways
05 Dec - 13 Dec	Qatar Airways
07 Dec - 13 Dec	Qatar Airways
31 Dec - 11 Jan	British Airways
21 Dec - 24 Dec	British Airways

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 $657

Return flights