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

Return flights

31 Aug - 15 Sep	Finnair
30 Aug - 14 Sep	Ryanair
31 Aug - 14 Sep	Finnair
30 Aug - 10 Sep	Ryanair
25 Aug - 31 Aug	Finnair
24 Aug - 09 Sep	KLM
21 Aug - 27 Aug	Finnair
31 Aug - 16 Sep	Qatar Airways
24 Aug - 31 Aug	Finnair
19 Aug - 26 Aug	Qatar Airways
22 Aug - 27 Aug	Qatar Airways
06 Aug - 31 Aug	Qatar Airways
27 Aug - 10 Sep	KLM
27 Aug - 03 Sep	KLM
19 Aug - 04 Sep	KLM
05 Aug - 12 Aug	Qatar Airways
13 Aug - 20 Aug	Finnair
24 Aug - 09 Sep	Finnair	direct
01 Aug - 22 Aug	Turkish Airlines
24 Aug - 31 Aug	Finnair	direct

Also check the deals for one-way flights from Helsinki to Tokyo 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 Helsinki to Tokyo in August from $859

Return flights