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

Return flights

01 Sep - 09 Sep	Aegean Airlines	direct
01 Sep - 23 Sep	Aegean Airlines
09 Sep - 16 Sep	SKY express
01 Sep - 08 Sep	Aegean Airlines
15 Sep - 23 Sep	Aegean Airlines
15 Sep - 24 Sep	Aegean Airlines
30 Sep - 06 Oct	Ryanair
02 Sep - 09 Sep	Scandinavian Airlines
20 Sep - 23 Sep	Aegean Airlines
06 Sep - 09 Sep	Norwegian Air Sweden AOC
01 Sep - 04 Sep	Aegean Airlines
27 Sep - 04 Oct	easyJet
28 Sep - 05 Oct	Ryanair
25 Sep - 04 Oct	airBaltic
23 Sep - 03 Oct	airBaltic
27 Sep - 04 Oct	airBaltic	direct

Also check the deals for one-way flights from Athens 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 Athens to Riga in September from 154€

Return flights