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

Return flights

05 Nov - 08 Nov	United
08 Nov - 15 Nov	Southwest Airlines
28 Nov - 06 Dec	Southwest Airlines
12 Nov - 16 Nov	Southwest Airlines
17 Nov - 25 Nov	Southwest Airlines
02 Nov - 09 Nov	Southwest Airlines
10 Nov - 16 Nov	Southwest Airlines
28 Nov - 03 Dec	Southwest Airlines
14 Nov - 17 Nov	Southwest Airlines
16 Nov - 23 Nov	Southwest Airlines
28 Nov - 11 Dec	Southwest Airlines
06 Nov - 11 Nov	Southwest Airlines
23 Nov - 27 Nov	Southwest Airlines
22 Nov - 01 Dec	Southwest Airlines

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

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 Ontario to San Juan in November from 287€

Return flights