both Pointe-à-Pitre and Fort-de-France in the French Caribbean (announced on March 25, 2013 before launch on June 1, 2013, following a two month delay in the start of service) were subsequently timed accordingly in the interest of convenient connections with American's San Juan flights. JetBlue became Seaborne's second airline partner, with an interlining agreement established between the two airlines in November 2013, later developing into a codeshare agreement in May 2015. On October 23, 2013, Seaborne Airlines announced its first destination in the Dominican Republic, with service to La Romana International Airport beginning on December 12, 2013. On November 7, 2013, the airline announced new routes to Saint Kitts and Nevis, with service to both Robert L. Bradshaw and Vance W. Amory International Airports starting on January 15, 2014. On December 18, 2013, Seaborne Airlines announced it was relocating its headquarters from Christiansted, St. Croix to San Juan, the move of which was completed by March 2014. On January 27, 2014, the airline announced service to Santiago de los Caballeros and Punta Cana in the Dominican Republic, with flights to Santiago's Cibao International Airport starting on March 15, 2014, and flights to Punta Cana International Airport starting on February 14, 2014. The airline also launched flights from San Juan to Sint Maarten with flights to Princess Juliana International Airport on March 3, 2014, as well as flights to Santo Domingo with flights to Las Américas International Airport on April 17, 2014. On March 10, 2014, Delta Air Lines became Seaborne's third airline partner through the establishment of an interline agreement, which later became a codeshare agreement in September 2016. On September 30, 2014, United Airlines joined as Seaborne's fourth airline partner with its own interlining agreement. On March 5, 2015, Seaborne announced Air Europa as its fifth airline partner, with the two airlines codesharing on Seaborne's flights from San Juan and Air Europa's flights from Adolfo Suárez Madrid–Barajas Airport to Santo Domingo's Las Américas International Airport, effective from March 29, 2015, although the codeshare agreement ended at a later date. On February 18, 2015, Seaborne Airlines announced new services to Anguilla with flights to Clayton J. Lloyd International Airport, starting on April 30, 2015. On September 1, 2015, the airline announced new services to Antigua with flights V. C. Bird International Airport beginning on December 13, 2015. On June 14, 2017, following the year-long suspension of its Antigua services, the