AirHint found the following cheapest return flights from Toronto (YYZ) to San Juan (SJU) in August 2025 (see full year).

Return flights

18 Aug - 22 Aug	Porter Airlines (Canada) Ltd
01 Aug - 06 Aug	Porter Airlines (Canada) Ltd
07 Aug - 14 Aug	Flair Airlines
10 Aug - 13 Aug	WestJet
07 Aug - 11 Aug	Porter Airlines (Canada) Ltd
02 Aug - 09 Aug	Porter Airlines (Canada) Ltd
19 Aug - 24 Aug	Flair Airlines
08 Aug - 12 Aug	WestJet
17 Aug - 24 Aug	WestJet
16 Aug - 24 Aug	Porter Airlines (Canada) Ltd

Also check the deals for one-way flights from Toronto to San Juan 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 Toronto to San Juan in August from $387

Return flights