Are they little tiny ones? (Compared to big ones)...and do you have heating vents underneath or near the windows?

must be a plague going on, I had that same problem a couple weeks ago, I had to kill them all, and then disinfect everything...

In the past, I found that fly sticky strip things can catch a lot of the buggers.
That has to be maddening!

we have that problem. we hang baggys oy vinger water up it helps

why didn't u tell us u live amityville :)

Yes, to the 1st reply about tiny flies, yes and I do have heat vents under the windows...... Help!!!!!

The most reiable thing (and least hazardous, besides a flyswatter) I've used for flies
is good old flypaper. You can buy the tubes in most stores,
carefully pull them out of the tube and hang them up. The flies will stick and you'll be able to enjoy things better.
I myself hate flies with a passion...

keep that kind of stuff far away from pets and children...

I just went wild with a fly swatter the other day. Couldn't find flypaper, so I pulled out ol' Bessie and smacked me some flies. They dropped like... well, flies.

Gross thing is, one of my dogs likes to eat them. He was following me around, cleaning up my trail... luckily they're organic flies. LOL

I'm not implying anything about your cleanliness, but is there any chance at all that somewhere in your place, there's something spoiled!!!? The only time I ever had a really bad infestation -- mine were cute little beetles -- it turned out that some dried Chinese spices, in sealed packages -- that I had bought and never used and had packed in a seldom used cabinet, were the source. sealed package.
Flies come from maggots, and maggots like dead things. Or if they're not from maggots, even a spoiled piece meat might be enough to attract them.
Good luck!!! Yucky, isn't it!!!?

Frankly, I blame the cat litter for our fly problem. My wife says they come from outside, but any excuse to bad mouth the cat. ;)

Thanks everyone for your help. We have decided that they want inside cuz they sense it is gona get cold soon. Also the 2 windows they are collecting on get the most sun and warmth all day long and it was warm today, sooo we'll see. Worst case, I'll call an exterminater (can't spell LOL) Judy