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

Return flights

29 Apr - 12 May	British Airways
24 Apr - 27 May	British Airways
08 Apr - 22 Apr	British Airways
07 Apr - 22 Apr	British Airways
23 Apr - 21 May	British Airways
08 Apr - 15 Apr	British Airways
29 Apr - 06 May	British Airways
29 Apr - 14 May	British Airways
29 Apr - 10 May	British Airways
24 Apr - 06 May	British Airways
24 Apr - 31 May	British Airways
24 Apr - 10 May	British Airways
27 Apr - 18 May	British Airways
07 Apr - 15 Apr	British Airways
20 Apr - 23 Apr	SWISS
09 Apr - 22 Apr	British Airways
07 Apr - 14 Apr	SWISS
08 Apr - 27 Apr	British Airways
13 Apr - 20 Apr	SWISS
08 Apr - 19 Apr	British Airways

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 $998

Return flights