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

Return flights

20 Aug - 22 Aug	Ryanair
14 Aug - 20 Aug	Ryanair
23 Aug - 30 Aug	Ryanair
09 Aug - 11 Aug	Ryanair
11 Aug - 16 Aug	Ryanair
01 Aug - 08 Aug	Ryanair
06 Aug - 09 Aug	Ryanair
08 Aug - 11 Aug	Ryanair
17 Aug - 21 Aug	Finnair
02 Aug - 09 Aug	Ryanair

Also check the deals for one-way flights from Sandefjord 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 Sandefjord to Helsinki in August from $160

Return flights