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

Return flights

30 Aug - 02 Sep	Ryanair
22 Aug - 29 Aug	Lufthansa
26 Aug - 27 Aug	Ryanair
27 Aug - 28 Aug	Ryanair
27 Aug - 30 Aug	Norwegian Air Sweden AOC
24 Aug - 29 Aug	airBaltic
26 Aug - 02 Sep	airBaltic	direct
23 Aug - 30 Aug	LOT
19 Aug - 26 Aug	Finnair
30 Aug - 02 Sep	airBaltic	direct
19 Aug - 23 Aug	LOT
23 Aug - 30 Aug	airBaltic	direct
19 Aug - 23 Aug	Bulgaria Air	direct

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.

Book a cheap hotel in Sofia

Cheap car rent in Sofia

Cheapest return flights from Riga to Sofia in August from $281

Return flights