 The Eastern Airlines system timetable dated June 13, 1967 lists flights independently operated by Caribair between San Juan and St. Thomas and also between San Juan and St. Croix.Caribair operated these flights with Convair 640 turboprop aircraft.In order to compete with an increase in flight activity from other airlines such as British West Indian Airways (BWIA) and Leeward Islands Air Transport (LIAT), Caribair ordered new McDonnell Douglas DC-9-30 jetliners, becoming as previously stated the first Puerto Rican-based airline to offer modern jet service.