Preheat the air fryer with the tray inside for 5 minutes at 390F (200C).
Pat the chicken breasts dry with a paper towel. Slice each breast into vertical strips, then into small, 1-inch cubes.
In a large bowl, combine the olive oil and seasonings. Add the chicken pieces to the bowl and toss to coat them with the seasoning.
Cook:
Place the chicken pieces in the preheated air fryer in a single layer, leaving a little space between each piece to allow the hot air to flow.
Cook for 10 to 12 minutes, stopping halfway through to give the basket a good shake and flip the pieces over. They're done when the internal temperature of the thickest piece has reached 165F (74C). Remove the cooked chicken bites from the basket and serve.