Cheapest return flights from Newark to San Juan in September from $119

AirHint found the following cheapest return flights from Newark (EWR) to San Juan (SJU) in September 2025 (see full year).

Return flights

30 Sep - 04 Oct Frontier Airlines direct
29 Sep - 02 Oct Frontier Airlines direct
28 Sep - 02 Oct Frontier Airlines direct
28 Sep - 03 Oct Frontier Airlines direct
25 Sep - 02 Oct Frontier Airlines direct
29 Sep - 04 Oct Frontier Airlines direct
28 Sep - 04 Oct Frontier Airlines direct
25 Sep - 04 Oct Frontier Airlines direct
25 Sep - 01 Oct Frontier Airlines direct
25 Sep - 26 Sep Frontier Airlines direct
30 Sep - 03 Oct Frontier Airlines direct
20 Sep - 27 Sep Frontier Airlines direct
26 Sep - 30 Sep Frontier Airlines direct
25 Sep - 30 Sep Frontier Airlines direct
28 Sep - 30 Sep Frontier Airlines direct
22 Sep - 26 Sep Frontier Airlines direct
23 Sep - 26 Sep Frontier Airlines direct
20 Sep - 26 Sep Frontier Airlines direct
22 Sep - 25 Sep Frontier Airlines direct
27 Sep - 30 Sep Frontier Airlines direct

Also check the deals for one-way flights from Newark to San Juan in September.

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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