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

Return flights

20 Mar - 26 Mar	KLM
15 Mar - 29 Mar	ITA Airways
25 Mar - 25 Apr	ITA Airways
04 Mar - 12 Mar	British Airways
27 Mar - 31 Mar	SWISS
04 Mar - 11 Mar	British Airways
04 Mar - 18 Mar	British Airways
03 Mar - 11 Mar	British Airways
11 Mar - 18 Mar	British Airways
06 Mar - 16 Mar	British Airways
09 Mar - 16 Mar	British Airways
23 Mar - 01 Apr	British Airways
13 Mar - 02 Apr	KLM
22 Mar - 05 Apr	KLM
11 Mar - 01 Apr	British Airways
23 Mar - 22 Apr	British Airways
20 Mar - 07 Apr	Lufthansa
31 Mar - 06 Apr	Lufthansa
24 Mar - 15 Apr	British Airways
27 Mar - 06 Apr	KLM

Also check the deals for one-way flights from London to Hanoi in March.

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 March from 740€

Return flights