AirHint found the following cheapest return flights from Minneapolis (MSP) to San Juan (SJU) in August 2025 (see full year).

Return flights

01 Aug - 07 Aug	Spirit Airlines
30 Aug - 07 Sep	Sun Country Airlines
13 Aug - 21 Aug	Spirit Airlines
07 Aug - 12 Aug	Spirit Airlines
19 Aug - 23 Aug	Delta
09 Aug - 16 Aug	Sun Country Airlines
02 Aug - 09 Aug	Sun Country Airlines
09 Aug - 16 Aug	Sun Country Airlines	direct
02 Aug - 09 Aug	Sun Country Airlines	direct
16 Aug - 20 Aug	Sun Country Airlines
02 Aug - 16 Aug	Sun Country Airlines	direct
28 Aug - 01 Sep	Sun Country Airlines

Also check the deals for one-way flights from Minneapolis to San Juan in August.

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 Minneapolis to San Juan in August from $282

Return flights