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

Return flights

04 Mar - 08 Mar	KLM
05 Mar - 11 Mar	KLM
07 Mar - 10 Mar	KLM
20 Mar - 23 Mar	Lufthansa
17 Mar - 24 Mar	Lufthansa
27 Mar - 30 Mar	KLM
26 Mar - 09 Apr	KLM
26 Mar - 30 Mar	KLM
27 Mar - 01 Apr	KLM
14 Mar - 20 Mar	KLM
15 Mar - 20 Mar	KLM
05 Mar - 15 Mar	KLM

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 213€

Return flights