Optional Brining (Recommended): Dissolve 1/4 cup kosher salt and 1 tablespoon sugar in 4 cups cold water. Submerge chicken breasts for 15 minutes. Rinse thoroughly and pat completely dry with paper towels.
Prepare Chicken: If not brining, pat chicken breasts dry with paper towels. For even cooking, use a sharp knife to butterfly thicker breasts or use a meat mallet to pound to uniform 3/4-inch thickness.
Season Precisely: Brush each breast with olive oil, ensuring complete but thin coverage. In a small bowl, combine remaining salt, pepper, garlic powder, paprika, and oregano. Sprinkle evenly over both sides of the chicken breasts.
Preheat Air Fryer: Set air fryer to 370°F (188°C) and preheat for 3 minutes.
Arrange Chicken: Place chicken breasts in air fryer basket with at least 1/2 inch space between pieces for optimal air circulation. Never overlap pieces.
Cook Precisely: Air fry for 5 minutes, then flip chicken using silicone-tipped tongs. Continue cooking for 5-7 more minutes, depending on thickness.
Verify Temperature: Use an instant-read digital thermometer to verify internal temperature has reached 165°F (74°C) at the thickest part.
Rest Properly: Transfer chicken to a cutting board and let rest for 5 minutes to allow for carryover cooking and moisture redistribution.
Optional Finishing: For enhanced flavor, drizzle with fresh lemon juice just before serving.