AirHint found the following cheapest return flights from Rockford (RFD) to San Juan (SJU) in June 2026 (see full year).
Return flights
| 18 Jun - 27 Jun | Allegiant Air | ||
| 22 Jun - 01 Jul | Allegiant Air | ||
| 24 Jun - 01 Jul | Allegiant Air | ||
| 25 Jun - 01 Jul | Allegiant Air |
Also check the deals for one-way flights from Rockford to San Juan in June.
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