AirHint found the following cheapest return flights from Montreal (YUL) to San Jose (SJO) in August 2026 (see full year).

Return flights

21 Aug - 31 Aug	Avianca
10 Aug - 17 Aug	Avianca
12 Aug - 19 Aug	Avianca
24 Aug - 31 Aug	Avianca
17 Aug - 24 Aug	Avianca
19 Aug - 26 Aug	Avianca
21 Aug - 28 Aug	Avianca
14 Aug - 21 Aug	Avianca
05 Aug - 12 Aug	Avianca
05 Aug - 14 Aug	Avianca
26 Aug - 02 Sep	Avianca
28 Aug - 04 Sep	Avianca
30 Aug - 06 Sep	Avianca
05 Aug - 02 Sep	Avianca
05 Aug - 04 Sep	Avianca
05 Aug - 06 Sep	Avianca
05 Aug - 07 Sep	Avianca
05 Aug - 09 Sep	Avianca
05 Aug - 11 Sep	Avianca
05 Aug - 13 Sep	Avianca

Also check the deals for one-way flights from Montreal to San Jose 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 San Jose in August from 275€

Return flights