JetBlue and Seaborne Airlines Launch Codeshare Agreement Throughout The Caribbean Agreement Expands Travel Options At San Juan Focus City NEW YORK – 10/13/2015 – JetBlue and Seaborne Airlines today began selling flights under a codeshare agreement that will offer customers increased travel options and new destinations throughout the Caribbean. Connections will be made via San Juan’s Luis Muñoz Marín International Airport (SJU), where JetBlue is the largest carrier. Customers