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

Return flights

29 Sep - 09 Oct	Ryanair
29 Sep - 06 Oct	Ryanair
25 Sep - 29 Sep	Ryanair
22 Sep - 29 Sep	Ryanair
27 Sep - 06 Oct	Ryanair
23 Sep - 30 Sep	Ryanair
29 Sep - 04 Oct	Ryanair
20 Sep - 24 Sep	Ryanair
25 Sep - 26 Sep	Ryanair
25 Sep - 28 Sep	Ryanair
29 Sep - 09 Oct	airBaltic	direct
27 Sep - 01 Oct	Ryanair
26 Sep - 29 Sep	Ryanair
24 Sep - 27 Sep	Ryanair
20 Sep - 22 Sep	Ryanair
22 Sep - 25 Sep	Ryanair
27 Sep - 04 Oct	LOT
29 Sep - 15 Oct	LOT
29 Sep - 06 Oct	Lufthansa	direct
29 Sep - 15 Oct	airBaltic	direct

Also check the deals for one-way flights from Frankfurt 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 Frankfurt to Riga in September from $183

Return flights