The flight distance from Paris, France to Freiburg, Germany is:261 miles / 419 km
443.61 kilometres (275.65 miles)
The "as the crow flies" distance is 638.7 miles or 1,028 km.
The straight-line distance is 296 miles. This is the true straight line distance which accounts for the curvature of the earth, NOT simply a straight line drawn on a map.