Patty, we don't have a fly problem, but I recommend that you identify the type of fly, and learn as much as you can about is life cycle. Most likely you can remove whatever its maggots (the little darlings that fly parents love so much) are using as a food source, and eliminate the problem.(posted 9659 days ago)As far as lady bugs, I have this problem, too, insofar as they like to come into my house every fall in large numbers. I learned from the county agent, among other sources, that they are just looking for a place to hibernate for the wintter. After learning that, I decided to leave them in the house all winter. When they start trying to get back outside (this happened this year about a week ago) I gently loosen their grip from the window panes, or wherever else they are looking like they are active, with a spoon, causing them to fall into my waiting (empty) coffee mug. Thence out the door.
Remember--lots of people PAY for these little cuties; they are totally carnivorous, feeding on all sorts of garden pests.
Viva la lady bug!