AirHint found the following cheapest return flights from Luxemburg (LUX) to Helsinki (HEL) in August 2025 (see full year).

Return flights

18 Aug - 27 Aug	KLM
25 Aug - 03 Sep	KLM
25 Aug - 30 Aug	Ryanair
14 Aug - 20 Aug	Lufthansa
22 Aug - 25 Aug	Lufthansa
19 Aug - 22 Aug	Lufthansa
18 Aug - 22 Aug	Lufthansa
11 Aug - 18 Aug	KLM
11 Aug - 14 Aug	Lufthansa
13 Aug - 22 Aug	Lufthansa
14 Aug - 22 Aug	Lufthansa

Also check the deals for one-way flights from Luxemburg to Helsinki in August.

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 Luxemburg to Helsinki in August from $213

Return flights