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

Return flights

26 Aug - 02 Sep	airBaltic	direct
26 Aug - 30 Aug	airBaltic	direct
19 Aug - 26 Aug	Ryanair
19 Aug - 26 Aug	airBaltic	direct
27 Aug - 02 Sep	Lufthansa
19 Aug - 22 Aug	Ryanair
23 Aug - 30 Aug	airBaltic	direct
21 Aug - 29 Aug	Austrian Airlines
28 Aug - 30 Aug	LOT
05 Aug - 09 Aug	airBaltic	direct
19 Aug - 23 Aug	Ryanair
26 Aug - 31 Aug	Ryanair
30 Aug - 02 Sep	airBaltic	direct

Also check the deals for one-way flights from Sofia to Riga 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 Sofia to Riga in August from $179

Return flights