In a large bowl, whisk together the cornmeal, flour, sugar, baking powder, and salt until combined.
In a separate bowl, whisk the egg, then add the buttermilk, melted butter, and honey. Stir until well blended.
Pour the wet ingredients into the dry ingredients and stir gently until just combined. A few small lumps are perfectly fine. Do not overmix or the cornbread will turn out tough.
Grease a 6 or 7-inch round cake pan generously with butter. Pour the batter into the pan and smooth the top evenly.
Preheat the air fryer to 325 degrees F for 2 minutes. Place the filled pan into the air fryer basket.
Air fry at 325 degrees F for 18 to 22 minutes, until the top is golden and a toothpick inserted into the center comes out clean. If the top is browning too fast, lay a small piece of foil over it for the remaining cook time.
Remove the pan from the air fryer and let the cornbread cool in the pan for 5 minutes before turning it out or slicing. Serve warm with a generous pat of butter.