Preheat the air fryer to 375°F.
In a small bowl, combine the olive oil, coriander, salt, and garlic powder. Stir until fully mixed.
Place the chicken thighs in a large bowl. Drizzle with the oil and spice mixture and toss well to coat. Allow to rest while the air fryer finishes preheating.
Spray the basket of the air fryer with non-stick spray.
Place 4–6 thighs in the basket at a time, leaving at least ½ inch between each piece. Work in batches if needed.
Cook for 10 minutes.
Remove the basket and flip the thighs. Cook for another 10 minutes.
Using a pastry brush, coat each thigh generously with BBQ sauce. Cook for another 5 minutes.
Remove the basket and flip the thighs. Brush the tops with more BBQ sauce. Cook for an additional 5–10 minutes, or until the thighs are cooked through and reach an internal temperature of 165°F.
Repeat with any remaining thighs if working in batches. Serve hot with extra BBQ sauce on the side.