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

Return flights

07 Oct - 11 Oct	airBaltic	direct
04 Oct - 11 Oct	airBaltic	direct
21 Oct - 27 Oct	Ryanair
04 Oct - 06 Oct	airBaltic
21 Oct - 27 Oct	airBaltic	direct
22 Oct - 26 Oct	Ryanair
10 Oct - 13 Oct	Lufthansa
23 Oct - 26 Oct	Ryanair
18 Oct - 21 Oct	airBaltic	direct
03 Oct - 06 Oct	Lufthansa

Also check the deals for one-way flights from Riga to Sofia in October.

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 October from 144€

Return flights