Cheapest one-way flights from Atlanta to San Juan in September from $55

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

One-Way flights

18 Sep Frontier Airlines
24 Sep Frontier Airlines
29 Sep Frontier Airlines
30 Sep Frontier Airlines
27 Sep Frontier Airlines
26 Sep Frontier Airlines
28 Sep Frontier Airlines
07 Sep Frontier Airlines
05 Sep Frontier Airlines
29 Sep Frontier Airlines direct

Also check the deals for return flights from Atlanta 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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