Cheapest return flights from Trenton to San Juan in December from 315€

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

Return flights

05 Dec - 08 Dec Frontier Airlines
11 Dec - 20 Dec Frontier Airlines
13 Dec - 23 Dec Frontier Airlines
31 Dec - 09 Jan Frontier Airlines
06 Dec - 11 Dec Frontier Airlines
11 Dec - 21 Dec Frontier Airlines
08 Dec - 12 Dec Frontier Airlines
12 Dec - 28 Dec Frontier Airlines
13 Dec - 19 Dec Frontier Airlines
15 Dec - 20 Dec Frontier Airlines
08 Dec - 15 Dec Frontier Airlines
27 Dec - 11 Jan Frontier Airlines
12 Dec - 19 Jan Frontier Airlines
23 Dec - 10 Jan Frontier Airlines
27 Dec - 01 Jan Frontier Airlines
30 Dec - 06 Jan Frontier Airlines
23 Dec - 07 Jan Frontier Airlines
30 Dec - 04 Jan Frontier Airlines
26 Dec - 01 Jan Frontier Airlines
30 Dec - 03 Jan Frontier Airlines

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

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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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