Comprehensive Recommendation
Given the considerable distance between Cabo Frio, RJ and Jacarau, PB, taking a flight would be the most efficient mode of transport. Flights are generally quicker and more convenient, particularly for long distances across Brazil. For this journey, I recommend booking your flights through LATAM Airlines or Gol Linhas Aéreas due to their reliability and customer service. Make sure to plan ahead and consider connecting flights, as direct routes are often not available.
If you prefer a more economical option and have time to spare, consider taking a bus. The long-distance travel will provide you with the opportunity to see different landscapes along the way and enjoy a unique experience of Brazilian road travel.