Preheat air fryer to 350°F.
In a medium shallow bowl, whisk together eggs, half and half, cinnamon, vanilla, and salt.
Dip each slice of bread in the egg mixture and turn to coat.
Shake off any excess moisture and set bread aside on a plate.
Spray inside of air fryer with non-stick spray and arrange soaked bread in a single layer (you may need to work in batches).
Air fry for 8 minutes, flipping half-way through.
Serve topped with powdered sugar or pure maple syrup.