AirHint found the following cheapest return flights from San Jose (SJO) to Montreal (YUL) in August 2025 (see full year).

Return flights

17 Aug - 30 Aug	Avianca
18 Aug - 31 Aug	Avianca
13 Aug - 16 Aug	Avianca
29 Aug - 01 Sep	jetBlue
28 Aug - 31 Aug	jetBlue
09 Aug - 25 Aug	Delta
11 Aug - 20 Aug	Air Canada	direct
09 Aug - 16 Aug	United
28 Aug - 31 Aug	Air Canada	direct
08 Aug - 15 Aug	Air Canada	direct
18 Aug - 31 Aug	Air Canada	direct

Also check the deals for one-way flights from San Jose to Montreal 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 San Jose to Montreal in August from $462

Return flights