Cheapest return flights from Trenton to San Juan in September from $284

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

Return flights

07 Sep - 12 Sep Frontier Airlines
21 Sep - 26 Sep Frontier Airlines
05 Sep - 13 Sep Frontier Airlines
25 Sep - 28 Sep Frontier Airlines
11 Sep - 15 Sep Frontier Airlines
13 Sep - 21 Sep Frontier Airlines
06 Sep - 14 Sep Frontier Airlines
07 Sep - 14 Sep Frontier Airlines
03 Sep - 08 Sep Frontier Airlines
25 Sep - 29 Sep Frontier Airlines
28 Sep - 02 Oct Frontier Airlines

Also check the deals for one-way flights from Trenton 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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