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

Return flights

27 May - 03 Jun	FrenchBee
31 May - 07 Jun	FrenchBee
16 May - 23 May	FrenchBee
02 May - 23 May	FrenchBee
30 May - 06 Jun	FrenchBee
25 May - 01 Jun	FrenchBee
24 May - 31 May	FrenchBee
10 May - 17 May	FrenchBee
29 May - 05 Jun	FrenchBee
27 May - 30 Jun	FrenchBee
31 May - 26 Jun	FrenchBee
02 May - 09 May	FrenchBee
22 May - 29 May	FrenchBee
28 May - 04 Jun	Porter Airlines (Canada) Ltd
06 May - 13 May	Porter Airlines (Canada) Ltd
23 May - 30 May	FrenchBee
07 May - 14 May	FrenchBee
04 May - 11 May	KLM
26 May - 02 Jun	KLM

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

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 May from $1030

Return flights