Cheapest one-way flights from Trenton to San Juan in September from $142

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

One-Way flights

02 Sep Frontier Airlines
14 Sep Frontier Airlines
20 Sep Frontier Airlines
26 Sep Frontier Airlines
29 Sep Frontier Airlines
05 Sep Frontier Airlines
06 Sep Frontier Airlines
07 Sep Frontier Airlines
08 Sep Frontier Airlines
11 Sep Frontier Airlines

Also check the deals for return 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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