Slice your tortillas into sixths.
Load the air fryer with as many pieces as fit in a single layer. Don't overlap to stack.
Spritz the tortilla pieces with cooking spray, then season with coarse salt.
Preheat the air fryer for at least 1 minute. Run it empty at 300 degrees Fahrenheit to get the heating element warmed up.
Air fry at 300 degrees Fahrenheit for 8 minutes. Don't open the air fryer. After 8 minutes, check for doneness.
Repeat with the remaining tortilla pieces. Keep going in batches until you've cooked all the tortilla pieces.