Cheapest return flights from Trenton to San Juan in July from $410

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

Return flights

29 Jul - 04 Aug Frontier Airlines
15 Jul - 20 Jul Frontier Airlines
18 Jul - 30 Jul Frontier Airlines
12 Jul - 16 Jul Frontier Airlines
16 Jul - 21 Jul Frontier Airlines
19 Jul - 24 Jul Frontier Airlines
13 Jul - 03 Aug Frontier Airlines
10 Jul - 14 Jul Frontier Airlines
23 Jul - 27 Jul Frontier Airlines
30 Jul - 03 Aug Frontier Airlines
11 Jul - 26 Jul Frontier Airlines
10 Jul - 26 Jul Frontier Airlines
08 Jul - 12 Jul Frontier Airlines

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

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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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