Preheat the air fryer: Set to 375°F (190°C) for 3–5 minutes.
A hot basket helps browning and reduces sticking.
Mix the burger base: In a bowl, combine ground turkey, onion, garlic, breadcrumbs, mayonnaise, Dijon, Worcestershire, salt, pepper, and smoked paprika. Stir gently with a fork or your hands until just combined. Don’t overmix or the burgers get dense.
Form the patties: Divide into 4 equal portions.
Lightly wet your hands and shape into 1/2-inch thick patties, about 4 inches wide. Press a slight dimple in the center to prevent doming.
Prep the basket: Lightly spray the air fryer basket with olive oil. Place patties in a single layer with space between.
Lightly mist the tops with oil.
Cook the first side: Air fry for 6–7 minutes at 375°F (190°C).
Flip and finish: Carefully flip. Air fry another 5–7 minutes, or until the internal temperature reaches 165°F (74°C) in the center. Add cheese in the last 1–2 minutes to melt.
Toast the buns: If you like, pop buns in the air fryer for 1–2 minutes at 350°F (175°C) until lightly crisp.
Build and serve: Rest patties 2 minutes, then layer with your favorite toppings.
Serve hot.