Cook the rigatoni pasta according to package instructions until al dente. Drain and rinse under cold water to cool.
In a large bowl, combine the cooled rigatoni, feta cheese, cranberries, walnuts, cucumber, cherry tomatoes, red onion, and parsley.
In a separate small bowl, whisk together the olive oil, lemon juice, Dijon mustard, honey, salt, and pepper until well combined.
Pour the lemon vinaigrette over the pasta salad and toss gently to combine all ingredients evenly.
Chill the salad in the refrigerator for at least 30 minutes before serving to allow the flavors to meld.
Serve cold or at room temperature.