AirHint found the following cheapest return flights from Tallinn (TLL) to Keflavik (KEF) in August 2025 (see full year).

Return flights

16 Aug - 21 Aug	airBaltic	direct
13 Aug - 17 Aug	airBaltic	direct
13 Aug - 21 Aug	airBaltic	direct
06 Aug - 10 Aug	airBaltic	direct
27 Aug - 31 Aug	airBaltic
13 Aug - 20 Aug	airBaltic
16 Aug - 22 Aug	Scandinavian Airlines
16 Aug - 23 Aug	airBaltic
25 Aug - 01 Sep	airBaltic
11 Aug - 17 Aug	airBaltic
13 Aug - 16 Aug	airBaltic

Also check the deals for one-way flights from Tallinn to Keflavik 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 Tallinn to Keflavik in August from $234

Return flights