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

Return flights

08 Sep - 16 Sep	Lufthansa
01 Sep - 10 Sep	Air France
03 Sep - 08 Sep	Air France
05 Sep - 08 Sep	Air France
01 Sep - 04 Sep	Air France
08 Sep - 24 Sep	Air France
01 Sep - 08 Sep	Air France
19 Sep - 22 Sep	airBaltic	direct
07 Sep - 22 Sep	airBaltic	direct
07 Sep - 24 Sep	airBaltic	direct
19 Sep - 03 Oct	airBaltic	direct

Also check the deals for one-way flights from Zurich 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 Zurich to Riga in September from $235

Return flights