AirHint found the following cheapest return flights from Riga (RIX) to Sofia (SOF) in August 2025 (see full year).

Return flights

26 Aug - 02 Sep	airBaltic	direct
05 Aug - 12 Aug	Ryanair
30 Aug - 06 Sep	airBaltic	direct
12 Aug - 21 Aug	Ryanair
13 Aug - 26 Aug	airBaltic
12 Aug - 26 Aug	airBaltic
12 Aug - 26 Aug	airBaltic	direct
04 Aug - 11 Aug	Ryanair
15 Aug - 19 Aug	Ryanair
19 Aug - 30 Aug	airBaltic
19 Aug - 30 Aug	airBaltic	direct
27 Aug - 27 Aug	airBaltic

Also check the deals for one-way flights from Riga to Sofia 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 Sofia in August from $180

Return flights