Cheapest return JAX–SJU flights, April

AirHint found the following cheapest return flights from Jacksonville (JAX) to San Juan (SJU) in April 2026 (see full year).

Return flights

24 Apr - 30 Apr Frontier Airlines
23 Apr - 30 Apr Frontier Airlines
24 Apr - 26 Apr Frontier Airlines
30 Apr - 04 May Frontier Airlines
20 Apr - 21 Apr Delta
21 Apr - 22 Apr Southwest Airlines
24 Apr - 27 Apr Southwest Airlines
22 Apr - 27 Apr Southwest Airlines
22 Apr - 27 Apr jetBlue direct

Also check the deals for one-way flights from Jacksonville to San Juan in April.

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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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