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

Return flights

30 Aug - 06 Sep	FrenchBee
28 Aug - 04 Sep	FrenchBee
27 Aug - 03 Sep	FrenchBee
25 Aug - 01 Sep	KLM
31 Aug - 07 Sep	KLM
24 Aug - 31 Aug	KLM
26 Aug - 02 Sep	KLM
18 Aug - 25 Aug	KLM
29 Aug - 05 Sep	KLM
22 Aug - 29 Aug	KLM
19 Aug - 26 Aug	KLM
21 Aug - 28 Aug	KLM
23 Aug - 30 Aug	FrenchBee
17 Aug - 24 Aug	KLM
05 Aug - 12 Aug	KLM
03 Aug - 10 Aug	KLM
04 Aug - 18 Aug	KLM

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

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 August from 1158€

Return flights