Wash the zucchini, then slice into round disks that are about 1/4 inch thick.
Place the sliced zucchini into a large colander and sprinkle one teaspoon of salt evenly over it and gently mix so that the salt is evenly distributed.
Let the salted zucchini sit in the colander for 30 minutes. You'll notice the zucchini begin to expell moisture beads.
After sitting, gently rinse the zucchini with cold water to wash off the excess salt and moisture.
Dump the zucchini onto a paper towel or clean dish towel laid out on the counter. Use another clean dish towel or paper towel to gently blot the moisture from the zucchini until it's dry.
Air Frying the Zucchini
Put the sliced zucchini into a large bowl, then add in olive oil and mix gently with a spoon to coat.
Add in salt, garlic powder, onion powder, paprika, pepper and flour. Then mix gently with a spoon to evenly coat the zucchini with the dry mixture.
If your air fryer requires pre-heating, pre-heat it to 400°F.
Depending on your air fryer setup you may or may not need to cook the zucchini in a few batches. If your air fryer has tiered levels and you can fit all of the zucchini in it, you can cook it all in one batch. If you have only one level to air fry or you don't have enouch space for all of it, you'll have to cook it in batches. If you're cooking in batches, you can pre-heat your oven to 250°F to keep your zucchini warm between batches.
Place the zucchini slices in one layer in the air fryer (do not overlap, or it won't cook evenly or crisp up). Cook at 400°F for 8-12 minutes. It should be golden brown and crispy when done. Repeat with subsequent batches.