Whisk olive oil, lemon juice, honey, garlic powder, oregano, basil, salt, pepper, and red pepper flakes together to create the marinade.
Pound chicken breasts to an even thickness and marinate them in the mixture for at least 30 minutes.
Prepare the tzatziki sauce by mixing Greek yogurt, grated cucumber, lemon juice, olive oil, garlic, salt, and fresh dill in a bowl.
Cook rice or quinoa according to package directions and prepare the vegetables by halving tomatoes and dicing cucumber.
Preheat the air fryer to 380°F and cook the marinated chicken breasts for about 10 minutes, until they reach an internal temperature of 165°F.
Allow the chicken to rest, then slice it.
Assemble the bowls by layering rice or quinoa, shredded lettuce, tomatoes, cucumber, sliced red onion, sliced chicken, feta cheese, and a generous dollop of tzatziki sauce.