AirHint found the following cheapest return flights from Ljubljana (LJU) to Riga (RIX) in September 2025 (see full year).

Return flights

25 Sep - 28 Sep	airBaltic	direct
04 Sep - 07 Sep	airBaltic	direct
11 Sep - 14 Sep	airBaltic	direct
05 Sep - 07 Sep	Norwegian Air Sweden AOC
18 Sep - 21 Sep	airBaltic	direct
09 Sep - 14 Sep	Air Serbia
26 Sep - 28 Sep	easyJet
18 Sep - 25 Sep	airBaltic
11 Sep - 13 Sep	airBaltic
09 Sep - 16 Sep	LOT

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

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 Ljubljana to Riga in September from 135€

Return flights