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

Return flights

30 Sep - 07 Oct	Norwegian Air Sweden AOC
24 Sep - 29 Sep	Aer Lingus
27 Sep - 07 Oct	easyJet
25 Sep - 27 Sep	easyJet
27 Sep - 30 Sep	easyJet
27 Sep - 01 Oct	easyJet
25 Sep - 07 Oct	easyJet
24 Sep - 27 Sep	Aer Lingus
28 Sep - 01 Oct	LOT
27 Sep - 04 Oct	easyJet
30 Sep - 02 Oct	easyJet
24 Sep - 28 Sep	Aer Lingus
27 Sep - 29 Sep	easyJet
28 Sep - 02 Oct	LOT
29 Sep - 03 Oct	LOT
24 Sep - 26 Sep	Aer Lingus
30 Sep - 04 Oct	LOT
19 Sep - 22 Sep	LOT
23 Sep - 30 Sep	LOT
22 Sep - 24 Sep	easyJet

Also check the deals for one-way flights from Paris 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 Paris to Riga in September from 146€

Return flights