Slice the ends off each sweet potato and cut them into wedges. Combine salt, pepper, smoked paprika, cayenne, cinnamon, onion powder, and garlic powder to make a seasoning blend.
Pour oil over the sweet potato wedges and toss to coat them. Pour the seasoning blend into the bowl and toss again to coat.
Preheat air fryer to 350F for 5 minutes. Arrange sweet potato wedges in an air fryer basket. Make sure that the wedges are not touching - you may need to cook them in more than one batch.
Air fry the seasoned sweet potato wedges at 350F for 8 minute. Remove them from the air fryer, flip them, and return them to cook for another 4 minutes. Allow them to cool slightly and enjoy!