AirHint found the following cheapest return flights from Detroit (DTW) to San Juan (SJU) in April 2026 (see full year).
Return flights
| 12 Apr - 19 Apr | Southwest Airlines | ||
| 03 Apr - 06 Apr | Avelo Airlines | ||
| 02 Apr - 09 Apr | Frontier Airlines | ||
| 03 Apr - 06 Apr | Delta | direct |
Also check the deals for one-way flights from Detroit to San Juan in April.
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