AirHint found the following cheapest return flights from Geneva (GVA) to St.-denis (RUN) in September 2025 (see full year).

Return flights

08 Sep - 05 Oct	easyJet
03 Sep - 18 Sep	easyJet
04 Sep - 14 Sep	easyJet
03 Sep - 17 Sep	easyJet
03 Sep - 16 Sep	easyJet
03 Sep - 20 Sep	easyJet
01 Sep - 14 Sep	easyJet
19 Sep - 04 Oct	easyJet
28 Sep - 12 Oct	easyJet
02 Sep - 14 Sep	easyJet
01 Sep - 10 Sep	easyJet
26 Sep - 12 Oct	easyJet
19 Sep - 03 Oct	easyJet
22 Sep - 28 Sep	easyJet
03 Sep - 19 Sep	easyJet
27 Sep - 12 Oct	Air France

Also check the deals for one-way flights from Geneva to St.-denis 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 Geneva to St.-denis in September from $874

Return flights