I live in a suburban/rural area and B4UFly has me listed in the radius of 5 airports. One is an actual single runway small country airport that flies daylight only, one is a helipad at a hospital, and three are grass in farmers fields that presumably a crop duster might take off from twice a year. In the Chicago area you might have a half dozen very small areas within fifty miles of the city that B4UFly says are not restricted. This isn't reasonable at all. I just stay away from the airport and keep my altitude below 400', you have no way of reaching most of the "airfields" that are listed.