Cheapest return flights from Detroit to San Juan in September from $140

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

Return flights

14 Sep - 18 Sep Spirit Airlines direct
21 Sep - 25 Sep Spirit Airlines direct
21 Sep - 02 Oct Spirit Airlines direct
14 Sep - 02 Oct Spirit Airlines direct
18 Sep - 02 Oct Spirit Airlines direct
14 Sep - 19 Sep Spirit Airlines
15 Sep - 18 Sep Spirit Airlines
09 Sep - 18 Sep Spirit Airlines
05 Sep - 18 Sep Spirit Airlines
19 Sep - 02 Oct Spirit Airlines
23 Sep - 02 Oct Spirit Airlines
15 Sep - 02 Oct Spirit Airlines
08 Sep - 12 Sep Frontier Airlines
21 Sep - 23 Sep Spirit Airlines
21 Sep - 29 Sep Spirit Airlines
28 Sep - 30 Sep Spirit Airlines
21 Sep - 12 Oct Spirit Airlines
21 Sep - 11 Oct Spirit Airlines
21 Sep - 05 Oct Spirit Airlines
21 Sep - 06 Oct Spirit Airlines

Also check the deals for one-way flights from Detroit 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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