Seaborne Airlines on April 1 will launch service from San Juan to three destinations: Dominica, Martinique and Guadeloupe.
The new routes will be flown with 34-seat Saab turboprops with in-flight service.
On Feb. 18, Seaborne launched its first interline arrangement with a major carrier, American Airlines. Baggage now is transferred between Seaborne and American on the ramp at San Juan.
St. Croix-based Seaborne eventually plans to issue boarding passes on American flights and have its flights displayed and sold on AA's website as part of the new interline arrangement, according to Gary Foss, Seaborne's president.
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