Royal Caribbean Ultimate World Cruise 2024. — this rich, immersive experience on serenade of the seas is the longest and most comprehensive world cruise out there, sailing roundtrip from miami on dec. Get ready for the ultimate vacation with royal caribbean.
— the ultimate world cruise, which set sail aboard royal caribbean’s serenade of the seas, departed from miami, florida on dec. 154 nights in 2026 starting at $95,000 per person.