Is the flight to Germany turbulent?
Cruise is smooth most of the way, but transatlantic flights to Frankfurt and Munich cross the North Atlantic jet stream, which can cause clear-air turbulence, especially in winter. Approaches into Munich can add brief mountain-wave turbulence off the Alps.
When is the smoothest time to fly to Germany?
May through September generally has a weaker jet stream and calmer air. Winter brings the strongest jet and the most clear-air turbulence on transatlantic routes.
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 Germany?
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. On overnight flights the smoothest air is usually found by belting over the blanket and staying buckled while you sleep.