Cheapest return flights from Ontario to San Juan in October from 372€

AirHint found the following cheapest return flights from Ontario (ONT) to San Juan (SJU) in October 2025 (see full year).

Return flights

19 Oct - 02 Nov Southwest Airlines
21 Oct - 31 Oct Southwest Airlines
01 Oct - 07 Oct Southwest Airlines
06 Oct - 14 Oct Southwest Airlines
22 Oct - 26 Oct Southwest Airlines
02 Oct - 05 Oct Southwest Airlines
07 Oct - 12 Oct Southwest Airlines
14 Oct - 18 Oct Southwest Airlines
08 Oct - 11 Oct Southwest Airlines
21 Oct - 24 Oct Southwest Airlines
15 Oct - 21 Oct Southwest Airlines

Also check the deals for one-way flights from Ontario to San Juan in October.

Skyscanner

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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