AirHint found the following cheapest return flights from Riga (RIX) to Lisbon (LIS) in August 2026 (see full year).

Return flights

10 Aug - 31 Aug	Scandinavian Airlines
24 Aug - 28 Aug	airBaltic
01 Aug - 10 Aug	airBaltic
27 Aug - 31 Aug	airBaltic
10 Aug - 31 Aug	airBaltic	direct
19 Aug - 26 Aug	Scandinavian Airlines
28 Aug - 04 Sep	airBaltic
24 Aug - 31 Aug	airBaltic
31 Aug - 31 Aug	airBaltic
10 Aug - 14 Aug	airBaltic	direct
10 Aug - 16 Aug	airBaltic
28 Aug - 04 Sep	airBaltic	direct

Also check the deals for one-way flights from Riga 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 Riga to Lisbon in August from 218€

Return flights