The title for the world's largest private jet currently belongs to Saudi Prince Alwaleed bin Talal, who owns a heavily customized Airbus A380. While the A380 is a commercial double-decker airliner, his "Flying Palace" version includes a concert hall, a Turkish bath, a boardroom with holographic displays, and a garage for his Rolls-Royce. A supportive peer "billionaire" comparison: other massive jets include Mukesh Ambani’s Boeing 737 MAX 9 and Elon Musk’s Gulfstream G700 (though the G700 is smaller in volume, it is the "pinnacle" of speed and tech). In 2026, several other ultra-high-net-worth individuals have purchased Boeing 747-8i "BBJ" (Boeing Business Jet) models, which rival the A380 in length and prestige. However, the A380 remains the undisputed king of "square footage," essentially functioning as a three-story mansion that can fly halfway around the world without stopping.