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

Return flights

31 Dec - 31 Jan	easyJet
30 Dec - 28 Jan	easyJet
31 Dec - 15 Jan	easyJet
26 Dec - 19 Jan	Air France
30 Dec - 06 Jan	Air France
23 Dec - 31 Dec	easyJet
30 Dec - 11 Jan	easyJet
30 Dec - 10 Jan	easyJet
23 Dec - 30 Dec	easyJet
30 Dec - 09 Jan	easyJet
23 Dec - 29 Dec	easyJet
24 Dec - 28 Dec	Air France
26 Dec - 11 Jan	SWISS
24 Dec - 10 Jan	easyJet

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

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 December from 648€

Return flights