In a bowl, combine olive oil, cumin, paprika, turmeric, cinnamon, garlic powder, salt, cayenne pepper, and lemon juice. Add the chicken thighs and toss until fully coated. Marinate for at least 20 minutes or up to overnight in the fridge.
Preheat the air fryer to 400°F (200°C). Place the chicken thighs in a single layer in the basket.
Air fry for 14 to 16 minutes, flipping halfway through, until the chicken is cooked through with slightly charred edges and the internal temperature reaches 165°F (74°C).
Let the chicken rest for 3 minutes, then slice into thin strips.
Warm the pita breads in the air fryer for 30 seconds. Spread hummus inside each pita, then fill with sliced chicken, diced cucumber, and pickled red onions. Drizzle with tahini sauce and serve.