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

Return flights

01 Dec - 07 Dec	KLM
10 Dec - 14 Dec	KLM
03 Dec - 07 Dec	KLM
27 Dec - 02 Jan	KLM
04 Dec - 07 Dec	KLM
27 Dec - 03 Jan	KLM
16 Dec - 12 Jan	Lufthansa
19 Dec - 11 Jan	KLM
27 Dec - 31 Dec	KLM
10 Dec - 17 Dec	KLM
31 Dec - 03 Jan	KLM
02 Dec - 06 Dec	KLM
30 Dec - 03 Jan	KLM
04 Dec - 06 Dec	KLM
04 Dec - 11 Dec	Lufthansa
26 Dec - 02 Jan	KLM
19 Dec - 24 Dec	KLM
29 Dec - 03 Jan	KLM
27 Dec - 01 Jan	KLM
28 Dec - 02 Jan	KLM

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

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 December from $270

Return flights