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

Return flights

12 Sep - 15 Sep	Air France
10 Sep - 22 Oct	Air France
11 Sep - 15 Sep	Air France
11 Sep - 22 Sep	Air France
09 Sep - 30 Sep	Air France
17 Sep - 30 Sep	Air France
17 Sep - 29 Sep	Air France
10 Sep - 24 Sep	Air France
12 Sep - 27 Sep	Air France
04 Sep - 18 Sep	Air France
15 Sep - 22 Sep	Vueling Airlines
24 Sep - 01 Oct	Air France
29 Sep - 05 Oct	Vueling Airlines
08 Sep - 27 Oct	easyJet
15 Sep - 04 Oct	Air France
27 Sep - 11 Oct	Air France
27 Sep - 18 Oct	Air France

Also check the deals for one-way flights from Lyon 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 Lyon to St.-denis in September from $989

Return flights