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

Return flights

25 Aug - 11 Sep	Spirit Airlines
24 Aug - 11 Sep	Spirit Airlines
08 Aug - 15 Aug	Spirit Airlines
30 Aug - 05 Sep	Sun Country Airlines
23 Aug - 30 Aug	Delta	direct
04 Aug - 08 Aug	Sun Country Airlines
29 Aug - 11 Sep	Spirit Airlines
23 Aug - 23 Aug	Delta	direct
05 Aug - 10 Aug	Spirit Airlines
09 Aug - 16 Aug	Sun Country Airlines	direct
16 Aug - 20 Aug	United
07 Aug - 10 Aug	Sun Country Airlines
16 Aug - 19 Aug	Southwest Airlines
14 Aug - 17 Aug	Sun Country Airlines
25 Aug - 02 Sep	Southwest 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 218€

Return flights