Preheat the air fryer to 390°F to 400°F
Pat the salmon fillets dry with paper towels
Brush or spray the fillets lightly with oil
Season with salt, pepper, and any desired spices
Place the salmon skin-side down in the air fryer basket
Leave space between fillets for air circulation
Air fry for 7 to 10 minutes, depending on thickness
Check for doneness with a fork; the salmon should flake easily
Cook until the internal temperature reaches 145°F
Remove from the air fryer and let rest for 1 to 2 minutes
Serve immediately