Preheat air fryer to 400 degrees Fahrenheit.
Spray frozen French fries with olive oil or cooking spray.
Sprinkle fries with salt and toss to coat.
Add the frozen French fries to the air fryer basket.
Cook the fries at 400 degrees Fahrenheit for 10 minutes. Then, toss the fries a couple of times and cook them for another 10 minutes.
Remove from air fryer, serve and enjoy!