AirHint found the following cheapest return flights from London (LCY) to Hanoi (HAN) in December 2026 (see full year).

Return flights

01 Dec - 15 Dec	British Airways
01 Dec - 14 Dec	British Airways
15 Dec - 29 Dec	ITA Airways
07 Dec - 21 Dec	KLM
09 Dec - 27 Dec	British Airways
06 Dec - 17 Dec	British Airways
07 Dec - 20 Dec	British Airways
11 Dec - 27 Dec	British Airways
11 Dec - 30 Dec	KLM
11 Dec - 29 Dec	British Airways
28 Dec - 12 Jan	ITA Airways
30 Dec - 10 Jan	Lufthansa
09 Dec - 10 Jan	KLM
14 Dec - 03 Jan	Lufthansa
12 Dec - 02 Jan	British Airways
27 Dec - 10 Jan	KLM
14 Dec - 09 Jan	KLM
16 Dec - 01 Jan	British Airways
23 Dec - 10 Jan	KLM
20 Dec - 10 Jan	KLM

Also check the deals for one-way flights from London to Hanoi 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 London to Hanoi in December from 840€

Return flights