Cheapest return flights from Milwaukee to San Juan in September from 185€

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

Return flights

18 Sep - 23 Sep Southwest Airlines
19 Sep - 24 Sep Southwest Airlines
19 Sep - 26 Sep Southwest Airlines
20 Sep - 30 Sep Delta
20 Sep - 27 Sep Delta
20 Sep - 29 Sep Southwest Airlines
18 Sep - 22 Sep Southwest Airlines
20 Sep - 28 Sep Southwest Airlines
05 Sep - 08 Sep Southwest Airlines

Also check the deals for one-way flights from Milwaukee 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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