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
20 May - 18 Jun	FrenchBee
24 May - 31 May	FrenchBee
25 May - 01 Jun	FrenchBee
30 May - 06 Jun	FrenchBee
04 May - 11 May	KLM
13 May - 20 May	KLM
05 May - 12 May	KLM
22 May - 29 May	FrenchBee
25 May - 28 Jun	FrenchBee
06 May - 13 May	KLM
12 May - 19 May	KLM
18 May - 25 May	KLM
20 May - 27 May	KLM
19 May - 26 May	KLM
25 May - 29 Jun	FrenchBee
25 May - 27 Jun	FrenchBee
26 May - 02 Jun	KLM
26 May - 30 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 948€

Return flights