Is the flight to Greece turbulent?
The long crossing to Athens is smooth most of the way, but it passes through the North Atlantic jet stream, where clear-air turbulence is most likely. In summer, afternoon thunderstorms over the Balkans and the Aegean can add convective turbulence on the final approach.
When is the smoothest time to fly to Greece?
Spring and autumn (April–June, September–October) balance a weaker jet stream with fewer summer thunderstorms. Winter has the strongest Atlantic jet; midsummer brings daily afternoon convection over southeastern Europe.
Why is there turbulence over the Atlantic?
The North Atlantic jet stream — a fast river of air at cruise altitude — creates wind shear at its edges that can jolt an aircraft without warning (clear-air turbulence, or CAT). It is strongest in winter and on the eastbound US→Europe leg, which rides the jet. Pilots change altitude to find smoother air, but CAT is invisible on radar, so it is the main reason to keep your belt on.
Where should I sit on a flight to Greece?
Over the wing, near the aircraft's center of gravity, gives the steadiest ride. Keep your seatbelt fastened even when the sign is off — clear-air turbulence over the Atlantic can appear suddenly. Overnight eastbound flights often cross the jet stream while you are sleeping, so belt over the blanket.