Using a knife or peeler, roughly scrape the skin of the bitter gourd. You can skip this step if the outer skin is very thin and tender.
Wash bitter gourd nicely. Pat dry with a towel before slicing.
Cut thin chips like rounds of bitter gourd using a sharp knife. Discard the seeds from the centre if you want. I leave them intact.
Transfer sliced bitter gourd to a bowl; add flour, seasoning, salt, and oil. Mix nicely to coat each piece with the flour and seasoning.
Preheat the air fryer to 170 degrees Celcius. Spray the air fryer basket with oil.
Arrange marinated bitter gourd slices neatly on the air fryer basket without overlapping.
Air Fry for 20 minutes, turning the karela chips halfway through. Or you can air fry them till the chips turn crisp and golden.
Serve karela chips as a snack or Indian side dish.