Cheapest return RIX–SOF flights, September

AirHint found the following cheapest return flights from Riga (RIX) to Sofia (SOF) in September 2026 (see full year).

Return flights

15 Sep - 19 Sep Ryanair
19 Sep - 22 Sep airBaltic direct
22 Sep - 09 Oct Ryanair
19 Sep - 06 Oct airBaltic direct
05 Sep - 12 Sep airBaltic direct
16 Sep - 19 Sep Ryanair
12 Sep - 16 Sep airBaltic
26 Sep - 29 Sep airBaltic direct
06 Sep - 12 Sep Ryanair
15 Sep - 19 Sep airBaltic direct
17 Sep - 20 Sep Lufthansa

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

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