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

Return flights

10 Apr - 22 Apr	Scandinavian Airlines
04 Apr - 15 Apr	KLM
10 Apr - 25 Apr	Scandinavian Airlines
10 Apr - 26 Apr	Scandinavian Airlines
15 Apr - 06 May	Air China
24 Apr - 05 May	Air China
24 Apr - 08 May	Air China
13 Apr - 03 May	Air China
21 Apr - 19 May	Air China
16 Apr - 07 May	Air China
17 Apr - 07 May	Air China
19 Apr - 07 May	Air China
20 Apr - 07 May	Air China
20 Apr - 08 May	Air China
02 Apr - 15 Apr	Scandinavian Airlines
05 Apr - 22 Apr	KLM
13 Apr - 23 Apr	Austrian Airlines
15 Apr - 29 Apr	Air China
06 Apr - 29 Apr	Air China
15 Apr - 27 Apr	Air China

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

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 April from 492€

Return flights