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

Return flights

17 Sep - 23 Sep	United
16 Sep - 20 Sep	United
05 Sep - 12 Sep	United
01 Sep - 06 Sep	United
12 Sep - 24 Sep	United
06 Sep - 06 Sep	United
04 Sep - 04 Sep	United
04 Sep - 07 Sep	WestJet
01 Sep - 01 Sep	WestJet

Also check the deals for one-way flights from Toronto to San Juan in September.

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 September from 243€

Return flights