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

Return flights

22 May - 31 May	Air China
25 May - 31 May	Air China
03 May - 17 May	Air China
31 May - 29 Jun	Air China
01 May - 15 May	Air China
01 May - 08 May	Air China
18 May - 25 May	Air China
08 May - 23 May	Air China
09 May - 23 May	Air China
10 May - 24 May	Air China
10 May - 17 May	Air China
18 May - 01 Jun	Air China
18 May - 03 Jun	Air China
13 May - 03 Jun	Air China
21 May - 05 Jun	Air China
18 May - 05 Jun	Air China
19 May - 03 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 535€

Return flights