Air France seems to have matched Air Caraibes and Corsair fare to Martinique or Guadeloupe! You can fly to the French Caribbean from only €338 for a roundtrip!
Corsair is having sale from Paris to Guadeloupe & Martinique with rates starting as low as €316 for a roundtrip!
(Updated) Nice chance to set off for a Caribbean hopper! Fly from Paris to Dominica (not to be confused with Dominican Republic) and return from Martinique back to Paris for only €275!EU
XL Airways are having sale from Paris to splendid Caribbean destinations - Guadeloupe and Martinique! Book the tickets starting at only €327 for a round trip!