Cheapest return flights from Trenton to San Juan in May from $190

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

Return flights

01 May - 06 May Frontier Airlines
01 May - 05 May Frontier Airlines
05 May - 09 May Frontier Airlines
03 May - 08 May Frontier Airlines
15 May - 18 May Frontier Airlines
07 May - 13 May Frontier Airlines
11 May - 18 May Frontier Airlines
14 May - 18 May Frontier Airlines
16 May - 20 May Frontier Airlines
13 May - 19 May Frontier Airlines
27 May - 02 Jun Frontier Airlines
26 May - 03 Jun Frontier Airlines
29 May - 01 Jun Frontier Airlines
28 May - 01 Jun Frontier Airlines

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

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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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