Cheapest return flights from Ontario (ONT) to San Juan (SJU), July

Select a price to book. see full year.

Dates, airline, and price
Dates Airline Price
19 Jul 25 Jul Southwest Airlines
20 Jul 25 Jul Southwest Airlines
20 Jul 23 Jul Southwest Airlines
15 Jul 22 Jul Southwest Airlines
10 Jul 14 Jul Southwest Airlines
25 Jul 30 Jul Southwest Airlines
28 Jul 02 Aug Southwest Airlines
16 Jul 22 Jul Southwest Airlines
14 Jul 21 Jul Southwest Airlines
21 Jul 26 Jul Frontier Airlines
23 Jul 28 Jul Southwest Airlines
29 Jul 02 Aug Southwest Airlines
27 Jul 02 Aug Southwest Airlines
25 Jul 01 Aug Southwest Airlines
22 Jul 11 Aug Southwest Airlines
28 Jul 04 Aug Southwest Airlines
26 Jul 03 Aug Southwest Airlines
30 Jul 03 Aug Southwest Airlines
29 Jul 05 Aug Southwest Airlines
23 Jul 02 Aug Southwest Airlines
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deals for one-way flights from Ontario to San Juan in July.

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Updated Jul 8, 2026.

About these fares

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