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

Return flights

26 May - 23 Jun	British Airways
27 May - 24 Jun	British Airways
14 May - 18 May	British Airways
26 May - 17 Jun	British Airways
19 May - 17 Jun	British Airways
27 May - 08 Jun	British Airways
27 May - 17 Jun	British Airways
20 May - 08 Jun	British Airways
26 May - 16 Jun	British Airways
31 May - 17 Jun	British Airways
20 May - 01 Jun	British Airways
14 May - 21 May	British Airways
22 May - 27 May	Lufthansa
01 May - 15 May	KLM
13 May - 25 May	SWISS
07 May - 11 May	SWISS
01 May - 12 May	SWISS
12 May - 26 May	KLM
19 May - 29 May	KLM
19 May - 26 May	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 $978

Return flights