How did this spider get its web from tree to tree?

We have a spider that is living between trees on our lawns. The neighbors tree is about 20 feet from our tree. The single strand of web going from tree to tree started about 10 feet up in our tree, and connected to the main body of the web not the other tree about 15 feet away. The web is itself about 2 feet in diameter. The arachnid is the size of a 50 cent piece, with it’s body looking more like the size of a penny in the center of that 50 cent piece. It is dark and molted like mossy oak camo. It’s abdomen is a cross between the hour glass style and the crab style abdomens, but leaning more toward hour glass. We think it is a orb weaver.

It takes down the web at daybreak, and has shown up with the arrival of the large formosan flies that resemble mosquitoes.

How can it get the web so far apart? Is it gliding over? This seems impossible without wings.