Cheapest return flights from Milwaukee to San Juan in May from $236

AirHint found the following cheapest return flights from Milwaukee (MKE) to San Juan (SJU) in May 2026 (see full year).

Return flights

13 May - 19 May United
06 May - 10 May United
06 May - 11 May American Airlines
08 May - 16 May Southwest Airlines
27 May - 03 Jun American Airlines
20 May - 02 Jun American Airlines
21 May - 24 May Southwest Airlines
26 May - 07 Jun Southwest Airlines

Also check the deals for one-way flights from Milwaukee to San Juan in May.

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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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