Is transatlantic turbulence dangerous?
Transatlantic turbulence is rarely dangerous. Modern aircraft are certified to handle forces far beyond typical turbulence. Most Atlantic turbulence is light to moderate. The main risk is injury from not wearing a seatbelt when unexpected turbulence occurs.
When is turbulence worst over the Atlantic?
Turbulence over the Atlantic is worst from December through March when the polar jet stream is strongest, often reaching 200+ mph. Summer (June–August) typically has calmer conditions. The North Atlantic Track System shifts daily to avoid the roughest air.
Which transatlantic routes are most turbulent?
Routes crossing the northern jet stream are most turbulent: JFK–LHR, BOS–LHR, and ORD–LHR in winter. Southern routes like MIA–LIS or JFK–MAD are generally smoother. Westbound flights (LHR→JFK) are rougher than eastbound due to headwinds.
What altitude has least turbulence over the Atlantic?
On transatlantic flights, pilots often request altitude changes to avoid turbulence. Flying above the jet stream (41,000–43,000 ft) or below it (below 30,000 ft) can reduce turbulence. The jet stream core is typically at 30,000–39,000 ft.