Cheapest return flights from Trenton to San Juan in January from $138

AirHint found the following cheapest return flights from Trenton (TTN) to San Juan (SJU) in January 2026 (see full year).

Return flights

22 Jan - 29 Jan Frontier Airlines
11 Jan - 14 Jan Frontier Airlines
08 Jan - 13 Jan Frontier Airlines
12 Jan - 15 Jan Frontier Airlines
24 Jan - 29 Jan Frontier Airlines
07 Jan - 14 Jan Frontier Airlines
12 Jan - 20 Jan Frontier Airlines
07 Jan - 13 Jan Frontier Airlines
09 Jan - 14 Jan Frontier Airlines
15 Jan - 20 Jan Frontier Airlines

Also check the deals for one-way flights from Trenton to San Juan in January.

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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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