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

Return flights

23 Dec - 05 Jan	Air China
22 Dec - 01 Jan	Air China
31 Dec - 07 Jan	Air China
26 Dec - 07 Jan	Air China
22 Dec - 04 Jan	Air China
29 Dec - 15 Jan	Air China
26 Dec - 04 Jan	Air China
28 Dec - 14 Jan	China Eastern
20 Dec - 31 Jan	China Eastern
22 Dec - 15 Jan	Air China
06 Dec - 27 Dec	Air China
07 Dec - 28 Dec	Air China
18 Dec - 28 Dec	Air China
19 Dec - 28 Dec	Air China
14 Dec - 21 Dec	Air China
15 Dec - 23 Dec	British Airways
12 Dec - 26 Dec	British Airways
14 Dec - 22 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.

Book a cheap hotel in London

Cheap car rent in London

Cheapest return flights from Hanoi to London in December from $662

Return flights