AirHint found the following cheapest return flights from Montreal (YUL) to St.-denis (RUN) in October 2026 (see full year).

Return flights

02 Oct - 09 Oct	FrenchBee
04 Oct - 11 Oct	FrenchBee
03 Oct - 10 Oct	FrenchBee
02 Oct - 19 Oct	KLM
25 Oct - 01 Nov	Air France
26 Oct - 02 Nov	Air France
27 Oct - 03 Nov	Air France
28 Oct - 04 Nov	Air France
05 Oct - 12 Oct	KLM
06 Oct - 13 Oct	KLM
11 Oct - 18 Oct	FrenchBee
29 Oct - 05 Nov	Air France
12 Oct - 19 Oct	KLM
13 Oct - 20 Oct	Air France
01 Oct - 08 Oct	KLM
31 Oct - 07 Nov	FrenchBee
30 Oct - 06 Nov	Air France

Also check the deals for one-way flights from Montreal to St.-denis in October.

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 Montreal to St.-denis in October from 1209€

Return flights