American Airlines has announced the launch of a new codeshare agreement with St. Croix-based Seaborne Airlines, providing customers access to six destinations in the Caribbean out of San Juan, Puerto Rico. The codeshare agreement allows American to place its code on Seaborne’s flights between San Juan and Dominica, Fort-de-France, Martinique, Pointe-a-Pitre, Guadeloupe, Tortola, British Virgin Islands, Vieques, Puerto Rico and Virgin Gorda, British Virgin Islands.