Preheat your oven to 350°F (175°C). Grease a loaf pan.
In a large bowl, whisk together the flour, sugar, baking powder, baking soda, and salt.
Stir in the cranberries and orange zest.
In another bowl, combine the orange juice, vegetable oil, and beaten egg.
Add the wet ingredients to the dry ingredients and mix until just combined.
Pour the batter into the prepared loaf pan.
Bake for 55 minutes or until a toothpick inserted into the center comes out clean.
Let the loaf cool in the pan for 10 minutes, then transfer to a wire rack to cool completely.