In decent soaring conditions we can go cross-country. You find a thermal and climb in it as high as you can and then venture off in search of your next thermal. You can't see them so this is where experience comes into play.
The World Record for distance covered in a single flight is just over 700km's! It took him over 10 hours to do it...no landings, no pit-stops. This happened in Texas.
The Canadian record is 330km achieved in Alberta. The Ontario record is 202km.