Cheapest return flights from Ontario to San Juan in March from $380

AirHint found the following cheapest return flights from Ontario (ONT) to San Juan (SJU) in March 2026 (see full year).

Return flights

06 Mar - 10 Mar Frontier Airlines
02 Mar - 07 Mar Southwest Airlines
04 Mar - 10 Mar Southwest Airlines
23 Mar - 26 Mar Southwest Airlines
01 Mar - 07 Mar Southwest Airlines
02 Mar - 09 Mar Southwest Airlines
25 Mar - 26 Mar Southwest Airlines
24 Mar - 26 Mar Southwest Airlines
18 Mar - 26 Mar Southwest Airlines
04 Mar - 11 Mar Southwest Airlines
25 Mar - 01 Apr Southwest Airlines
30 Mar - 06 Apr Southwest Airlines
29 Mar - 01 Apr Southwest Airlines
29 Mar - 08 Apr Southwest Airlines
31 Mar - 06 Apr Southwest Airlines
29 Mar - 04 Apr Southwest Airlines
28 Mar - 04 Apr Southwest Airlines
29 Mar - 05 Apr Southwest Airlines
22 Mar - 05 Apr Southwest Airlines

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

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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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