Cheapest return flights from Newark to San Juan in September from 106€

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

Return flights

16 Sep - 20 Sep Frontier Airlines direct
18 Sep - 25 Sep Frontier Airlines direct
09 Sep - 24 Sep Frontier Airlines direct
08 Sep - 12 Sep Frontier Airlines direct
26 Sep - 28 Sep Frontier Airlines direct
09 Sep - 12 Sep Frontier Airlines direct
15 Sep - 18 Sep Frontier Airlines direct
17 Sep - 22 Sep Frontier Airlines direct
07 Sep - 10 Sep Frontier Airlines direct
01 Sep - 10 Sep Frontier Airlines direct
28 Sep - 02 Oct Frontier Airlines direct
20 Sep - 04 Oct Frontier Airlines direct
26 Sep - 05 Oct Frontier Airlines direct
20 Sep - 02 Oct Spirit Airlines
17 Sep - 01 Oct United direct
19 Sep - 03 Oct United direct
27 Sep - 11 Oct United direct
28 Sep - 12 Oct United direct
24 Sep - 08 Oct United direct
25 Sep - 09 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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