AirHint found the following cheapest return flights from Lima (LIM) to San Juan (SJU) in September 2025 (see full year).

Return flights

23 Sep - 01 Oct	Avianca
18 Sep - 21 Sep	Avianca
23 Sep - 23 Sep	Avianca
16 Sep - 24 Sep	Avianca
10 Sep - 17 Sep	Arajet
09 Sep - 16 Sep	Avianca
12 Sep - 16 Sep	Avianca
11 Sep - 16 Sep	Avianca
12 Sep - 15 Sep	Avianca
04 Sep - 01 Oct	Avianca
05 Sep - 11 Sep	Avianca
04 Sep - 13 Sep	Avianca

Also check the deals for one-way flights from Lima to San Juan in September.

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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Cheapest return flights from Lima to San Juan in September from $372

Return flights