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

Return flights

16 Aug - 23 Aug	Spirit Airlines
15 Aug - 22 Aug	Avianca
22 Aug - 31 Aug	Avianca
01 Aug - 08 Aug	Avianca
23 Aug - 31 Aug	Avianca
28 Aug - 06 Sep	Spirit Airlines
29 Aug - 06 Sep	Spirit Airlines
09 Aug - 25 Aug	Delta
25 Aug - 31 Aug	Avianca
24 Aug - 30 Aug	Avianca
01 Aug - 10 Aug	Avianca
25 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 441€

Return flights