In 2026, aviation data continues to rank the short-haul flight between Mendoza, Argentina, and Santiago, Chile, as the most turbulent route in the world. This 196-kilometer journey crosses the Andes, one of the most rugged and high-altitude mountain ranges on Earth. The primary driver of this turbulence is "mountain wave activity," where strong winds hit the steep peaks and create massive, invisible ripples in the air. Other notoriously rough routes include Xining to Yinchuan in China, where plateau terrain and wind shear create significant atmospheric instability. In Europe, the flight between Nice and Geneva often sees high turbulence due to Alpine wind systems. While long-haul flights across the Pacific can also encounter severe "Clear Air Turbulence" (CAT), these short-to-medium-haul routes over major mountain ranges consistently record the highest levels of vertical air currents, frequently making them feel like a high-speed roller coaster for passengers.