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

Return flights

09 Apr - 14 Apr	KLM
30 Apr - 04 May	KLM
30 Apr - 07 May	KLM
29 Apr - 04 May	KLM
11 Apr - 13 Apr	KLM
15 Apr - 18 Apr	KLM
01 Apr - 08 Apr	KLM
01 Apr - 17 Apr	KLM
01 Apr - 12 Apr	KLM
03 Apr - 06 Apr	KLM
02 Apr - 06 Apr	KLM
30 Apr - 05 May	Lufthansa
27 Apr - 05 May	KLM
14 Apr - 21 Apr	KLM
21 Apr - 24 Apr	KLM

Also check the deals for one-way flights from London to Helsinki 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 Helsinki in April from 216€

Return flights