AirHint found the following cheapest return flights from Detroit (DTW) to San Juan (SJU) in March 2026 (see full year).

Return flights

01 Mar - 05 Mar	Spirit Airlines
02 Mar - 06 Mar	American Airlines
09 Mar - 13 Mar	American Airlines
06 Mar - 10 Mar	jetBlue
10 Mar - 14 Mar	American Airlines
03 Mar - 07 Mar	American Airlines
16 Mar - 20 Mar	jetBlue
16 Mar - 20 Mar	Delta	direct
13 Mar - 17 Mar	jetBlue
15 Mar - 19 Mar	jetBlue
28 Mar - 01 Apr	jetBlue
30 Mar - 03 Apr	jetBlue
31 Mar - 04 Apr	jetBlue
29 Mar - 02 Apr	American Airlines
28 Mar - 01 Apr	Delta	direct

Also check the deals for one-way flights from Detroit to San Juan in March.

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 Detroit to San Juan in March from $269

Return flights