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

Return flights

19 Sep - 22 Sep	Lufthansa
15 Sep - 21 Sep	United
18 Sep - 25 Sep	Lufthansa
04 Sep - 11 Sep	Iberia
06 Sep - 13 Sep	Iberia
03 Sep - 17 Sep	Iberia
25 Sep - 01 Oct	Iberia
05 Sep - 19 Sep	easyJet
06 Sep - 20 Sep	Air France
23 Sep - 20 Oct	Lufthansa
04 Sep - 20 Sep	Lufthansa
05 Sep - 14 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 696€

Return flights