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

Return flights

22 Sep - 28 Sep	Air France
23 Sep - 03 Oct	Air France
15 Sep - 28 Sep	United
25 Sep - 10 Oct	Lufthansa
21 Sep - 28 Sep	Air France
02 Sep - 10 Sep	easyJet
14 Sep - 25 Sep	United
13 Sep - 21 Sep	United
08 Sep - 21 Sep	United
01 Sep - 07 Sep	Iberia
10 Sep - 17 Sep	Lufthansa
15 Sep - 20 Sep	Iberia

Also check the deals for one-way flights from Milan 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 Milan to San Juan in September from $812

Return flights