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

Return flights

18 May - 31 May	Air China
09 May - 20 May	Air China
20 May - 27 May	Air China
11 May - 27 May	Air China
24 May - 31 May	Air China
09 May - 30 May	Air China
09 May - 23 May	Air China
17 May - 01 Jun	Air China
18 May - 02 Jun	Air China
06 May - 10 May	Air China
03 May - 31 May	Air China
01 May - 17 May	Air China
17 May - 03 Jun	Air China
29 May - 12 Jun	Air China
31 May - 14 Jun	Air China
14 May - 15 Jun	Etihad Airways
17 May - 02 Jun	Etihad Airways
29 May - 14 Jun	China Eastern
22 May - 06 Jun	China Eastern
21 May - 06 Jun	Air China

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 561€

Return flights