I was all ways taught to "bury" the ends in the seam.
Kathy G in MI

You pull a little of the cording itself out of its covering and cut it off(just the cording) and bury the ends in the seam. I always clip my corners and curves also so they lay better.
Kathi

I saw directions for unraveling the ends & rebraiding it to a continous piece. I think Sew News,Threads or Sewing Savvy 2003-2005 range. Maybe someone else remembers the article.

When I do it I cross the ends over each other and sew across them. It is difficult, you have to walk your foot across it slowly. Also if you use your zipper foot you can get closer to the cord.

I also cross the ends over and sew over it.

You will need to untwist it and then retwist and sew. I found this document (they also have other tips that are very good). Sort of hard to visualize. Do it a few times on junk material. There are better/more detailed instruction in the book The Experts' Book of Sewing Tips & Techniques by Rondale Press, pgs. 204-205. Check the library for a copy for a quick look.

Good Luck!!!!

Here is a link that might be useful: Minutes Matter tips

Thank you all! ATC that was a great site, thanks!
I finally decided to just go around the back corner, make a loop to attach the ties and call it quits! My chairs have wood slats in the middle, so the back of the cushion won't show anyway. The cord I am using is VERY thick and stiff, so any other application was going to be a pain when I had to stitch through two layers of cord, plus fabric!
I appreciate all of the ideas, and have them filed away for future reference!!
Have a great weekend and holiday next week!

I always cut the bias and sew it closed. ALWAYS. The insert I use most frequently is an extruded PVC bead intended for use on outdoor furniture or marine use.

I do a lot of work with yacht interiors and often the fabrics in question are thick. Overlapping the bias is too bulky, so I've opted for the stitched method. With the PVC insert there is no need to unwind and the rewrap anything.

I think this is a confusing post. The OP's "cording" is actually a multi-cord braid. I've never been able to butt joint or overlap with any real success. It should (believe me, it doesn't always) look like a continuous piece with no beginning nor end. This is the reason for the removing it off the lip and untwisting and retwisting. It takes time and patience.

On a welt I've always used chelone's method.

Yeppers...it is a multi cord braid...I always use Chelone's method for the other sort of cording!! I gave up on the retwisting(although I saved the directions for another day), and ended by going out of the seam about 3" from the back corner. I inserted the chair ties under the cord on the back corners before I ended the cording. It sounds dumb(even to me), but it looks great. These were odd chair cushions anyway, but we were all delighted with the finished product!!
Thank you ALL for your help!