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

Return flights

06 May - 11 May	Lufthansa
14 May - 25 May	Lufthansa
04 May - 20 May	Lufthansa
20 May - 15 Jun	British Airways
27 May - 22 Jun	British Airways
18 May - 08 Jun	British Airways
27 May - 07 Jun	British Airways
07 May - 17 May	British Airways
18 May - 03 Jun	British Airways
20 May - 10 Jun	British Airways
05 May - 19 May	Lufthansa
19 May - 31 May	British Airways
12 May - 26 May	British Airways
21 May - 02 Jun	British Airways
10 May - 20 May	KLM
20 May - 31 May	British Airways
29 May - 07 Jun	KLM
20 May - 30 May	SWISS
14 May - 14 Jun	British Airways
24 May - 08 Jun	KLM

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

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 May from 871€

Return flights