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

Return flights

03 Mar - 11 Mar	KLM
23 Mar - 30 Mar	KLM
09 Mar - 16 Mar	KLM
03 Mar - 10 Mar	KLM
19 Mar - 30 Mar	KLM
05 Mar - 13 Mar	KLM
09 Mar - 23 Mar	KLM
13 Mar - 20 Mar	Lufthansa
13 Mar - 16 Mar	Lufthansa
19 Mar - 26 Mar	KLM
28 Mar - 06 Apr	KLM
20 Mar - 17 Apr	KLM
28 Mar - 04 Apr	KLM
31 Mar - 03 Apr	Lufthansa

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

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 March from $257

Return flights