I took the nutritional info from here: http://www.popsecret.com/products/better-for-you-flavors/
One bag is 3 servings, and one serving (5 cups once popped) is 3 points. So it should be roughly 9 pointsplus, give or take a point, although I didn't actually enter it into my tracker.
You can search for almost any food and it lists the nutrition info and Weight Watchers points for 3 of their plans, including PointsPlus. I stopped using weight watchers a while ago but still check things once in a while to see what the points might be.