AirHint found the following cheapest return flights from London (LCY) to Helsinki (HEL) in July 2025 (see full year).

Return flights

16 Jul - 21 Jul	Lufthansa
16 Jul - 22 Jul	Lufthansa
16 Jul - 30 Jul	Lufthansa
16 Jul - 17 Jul	Lufthansa
16 Jul - 18 Jul	Lufthansa
21 Jul - 28 Jul	Lufthansa
25 Jul - 28 Jul	Lufthansa
16 Jul - 23 Jul	Lufthansa
21 Jul - 05 Aug	Lufthansa
16 Jul - 27 Jul	Lufthansa
22 Jul - 28 Jul	Lufthansa
28 Jul - 07 Aug	KLM
28 Jul - 01 Aug	KLM
29 Jul - 05 Aug	Lufthansa
30 Jul - 06 Aug	KLM
30 Jul - 05 Aug	KLM
28 Jul - 06 Aug	KLM
28 Jul - 05 Aug	KLM
28 Jul - 09 Aug	KLM
31 Jul - 07 Aug	Lufthansa

Also check the deals for one-way flights from London to Helsinki in July.

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 July from $426

Return flights