To prepare pita chips, arrange pita wedges on a baking sheet; coat with cooking spray. Combine cumin, paprika, and oregano in a small bowl; sprinkle over pita wedges. Bake at 400° for 10 minutes or until toasted. Reserve 6 pita chips for another use.
To prepare chicken salad, combine 2 tablespoons chopped red onion and next 5 ingredients (through chicken) in a bowl.
Serve 5 pita chips with 1/2 cup chicken salad and English cucumber slices, if desired.