01 - Combine olive oil, lemon zest, lemon juice, minced garlic, smoked paprika, salt, black pepper, and dill in a small bowl.
02 - Pat salmon fillets dry with paper towels and brush both sides with the marinade, reserving 1 tablespoon for the asparagus.
03 - Toss trimmed asparagus spears with the reserved marinade in a bowl.
04 - Preheat air fryer to 400°F (200°C) for 3 minutes.
05 - Place salmon fillets skin-side down in the air fryer basket with space between, and arrange asparagus around them.
06 - Air fry for 10 to 12 minutes until salmon reaches an internal temperature of 125–130°F and asparagus is tender and crisp.
07 - Serve immediately garnished with lemon wedges and optional fresh herbs.