Cheapest return flights from Newark to San Juan in September from 149€

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

Return flights

20 Sep - 26 Sep Frontier Airlines direct
09 Sep - 20 Sep Frontier Airlines direct
16 Sep - 20 Sep Frontier Airlines direct
20 Sep - 24 Sep Frontier Airlines direct
14 Sep - 20 Sep Frontier Airlines direct
15 Sep - 20 Sep Frontier Airlines direct
23 Sep - 30 Sep Frontier Airlines direct
27 Sep - 04 Oct Frontier Airlines direct
22 Sep - 27 Sep Frontier Airlines direct
29 Sep - 03 Oct jetBlue direct
16 Sep - 26 Sep Frontier Airlines direct
13 Sep - 20 Sep Frontier Airlines direct
24 Sep - 01 Oct Frontier Airlines direct
29 Sep - 02 Oct Frontier Airlines direct
14 Sep - 01 Oct Frontier Airlines direct
29 Sep - 06 Oct jetBlue direct
30 Sep - 07 Oct jetBlue direct
30 Sep - 05 Oct Frontier Airlines direct
30 Sep - 09 Oct United direct
27 Sep - 02 Oct Spirit Airlines

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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