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

Return flights

22 Aug - 10 Sep	Air France
30 Aug - 06 Sep	Air France
23 Aug - 10 Sep	KLM
25 Aug - 31 Aug	Ryanair
23 Aug - 01 Sep	Ryanair
26 Aug - 29 Aug	SWISS
24 Aug - 01 Sep	Ryanair
31 Aug - 06 Sep	Ryanair
21 Aug - 12 Sep	Finnair
25 Aug - 29 Aug	Ryanair
18 Aug - 26 Aug	Air France
28 Aug - 31 Aug	Ryanair
25 Aug - 30 Aug	Ryanair
24 Aug - 29 Aug	SWISS
26 Aug - 31 Aug	Ryanair
18 Aug - 30 Aug	Air France
24 Aug - 31 Aug	Ryanair
23 Aug - 06 Sep	SWISS

Also check the deals for one-way flights from Tallinn to Lisbon 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 Lisbon in August from $245

Return flights