Why is the Andes turbulence so extreme?
The Andes reach over 22,000 ft (6,700m) — far higher than the Rockies or Alps. Strong westerly winds crossing these peaks create mountain waves of extraordinary intensity. The SCL-MDZ route has recorded the highest average turbulence of any route in the world (EDR 22.98 in 2024 data).
Which Andes routes are most turbulent?
Santiago (SCL) to Mendoza (MDZ) is the world's most turbulent route. Córdoba (COR) to Santiago, Salta (MDZ) to Salta (SLA), and Buenos Aires (EZE) to Santiago are all extreme. Even La Paz (LPB) to Santiago crosses severe mountain wave zones.
Are Andes flights safe despite the turbulence?
Yes, these routes are flown safely thousands of times per year. Aircraft on Andes crossings are rated for forces far beyond what even extreme turbulence produces. The routes are short (1–2 hours), so exposure time is limited. However, remaining seated with seatbelt fastened is critical.
When is turbulence worst in the Andes?
Andes turbulence peaks in the Southern Hemisphere winter (June–August) when westerly winds are strongest. However, mountain wave turbulence occurs year-round. There is no truly calm season — even summer months see significant turbulence on these routes.