Cheapest return flights from Ontario to San Juan in August from $390

Best time to book flights for Ontario (ONT) to San Juan (SJU) flights at AirHint

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

Return flights

16 Aug - 22 Aug Delta
19 Aug - 26 Aug Southwest Airlines
15 Aug - 22 Aug Southwest Airlines
19 Aug - 25 Aug Southwest Airlines
20 Aug - 26 Aug Southwest Airlines
25 Aug - 31 Aug Southwest Airlines
20 Aug - 27 Aug Southwest Airlines
21 Aug - 26 Aug Southwest Airlines
21 Aug - 25 Aug Southwest Airlines
25 Aug - 01 Sep Southwest Airlines
14 Aug - 19 Aug Southwest Airlines
30 Aug - 03 Sep Southwest Airlines
29 Aug - 03 Sep Southwest Airlines
27 Aug - 03 Sep Southwest Airlines
28 Aug - 01 Sep jetBlue
19 Aug - 02 Sep jetBlue

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

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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