Cheapest return flights from Newark to San Juan in September from $155

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

Return flights

05 Sep - 11 Sep Delta
05 Sep - 12 Sep Delta
27 Sep - 04 Oct Delta
09 Sep - 12 Sep Frontier Airlines direct
25 Sep - 30 Sep Frontier Airlines direct
17 Sep - 27 Sep jetBlue direct
02 Sep - 11 Sep jetBlue direct
14 Sep - 18 Sep jetBlue direct
09 Sep - 20 Sep jetBlue direct
08 Sep - 11 Sep jetBlue direct
01 Sep - 30 Sep Frontier Airlines direct
27 Sep - 04 Oct Frontier Airlines direct
20 Sep - 04 Oct Frontier Airlines direct
25 Sep - 02 Oct Frontier Airlines direct
22 Sep - 06 Oct United direct
23 Sep - 07 Oct United direct
24 Sep - 08 Oct United direct
26 Sep - 10 Oct United direct
27 Sep - 11 Oct United direct
17 Sep - 01 Oct United 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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