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

Return flights

15 Apr - 28 Apr	SWISS
28 Apr - 12 May	British Airways
18 Apr - 30 Apr	SWISS
21 Apr - 13 May	British Airways
14 Apr - 28 Apr	KLM
28 Apr - 05 May	SWISS
28 Apr - 07 May	British Airways
30 Apr - 17 May	SWISS
13 Apr - 13 May	British Airways
29 Apr - 10 May	British Airways
23 Apr - 10 May	British Airways
15 Apr - 22 Apr	Condor
01 Apr - 15 Apr	SWISS
01 Apr - 21 Apr	SWISS
22 Apr - 07 May	KLM
06 Apr - 05 May	KLM
03 Apr - 20 Apr	SWISS
16 Apr - 22 Apr	Condor
08 Apr - 22 Apr	KLM
14 Apr - 21 Apr	Condor

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 $1034

Return flights