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

Return flights

09 Dec - 16 Dec	Scandinavian Airlines
10 Dec - 15 Dec	Scandinavian Airlines
02 Dec - 05 Dec	Scandinavian Airlines
01 Dec - 08 Dec	Scandinavian Airlines
11 Dec - 14 Dec	Scandinavian Airlines
04 Dec - 07 Dec	Scandinavian Airlines
11 Dec - 15 Dec	Scandinavian Airlines
03 Dec - 06 Dec	Scandinavian Airlines
04 Dec - 06 Dec	Scandinavian Airlines
10 Dec - 13 Dec	Scandinavian Airlines

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 $185

Return flights