In a medium bowl, whisk the lemon zest, lemon juice, olive oil, soy sauce, dill, garlic, and ground black pepper.
In a large container or zip top bag, combine the marinade and salmon fillets. Make sure the salmon is covered entirely and seal the container. Let marinate in the refrigerator for at least 15 minutes, up to 1 hour.
Remove the salmon and drain any excess marinade. Lightly spray the air fryer basket with cooking spray or brush with olive oil. Place salmon in the basket, allowing at least half an inch of space between the fillets. If they are packed in too closely, they will steam instead of getting crispy.
Air fry for 8-10 minutes at 400 degrees Fahrenheit, or until the internal temperature of the salmon is 145 degrees Fahrenheit.
Garnish with fresh dill and lemon wedges and serve immediately.