Not sure what kind of beasts you have but some apple cider vinegar and dish soap works like a charm for me. Definitely need to find the source though. Usually it’s some old fruit that got left out somewhere.

Move your lightly cupped, relaxed hand behind the fly. Then suddenly accelerate and grab the fly that got startled into flying into your hand by the movement.

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I’ve been using these for mossies for years, I know it’s not the friendliest of routes but they are not exactly friends either.

Get a dish towel wet and use that to swat at the fly. The weight of the water and the extra length of the towel let’s you get it going faster than the fly can react.

I slap them mid air when they are slower and with a towel when they fly more erratic and quick.
Satisfying and I get to feed my fly trap

Fly strips work. They work even better after catching a few flies (I guess misery loves company!). They’re cheap too.

The vinegar thing is for fruit flies or gnats - it doesn’t really work on typical house flies.

Or… you could use a fly gun. … : D

If you want to catch then when they land you can slowly approach them with both hands like you’re gonna clap. They will try to avoid one hand and fly to the other hand and you can catch it.

Fan works. Bubble maker like the one on weddings can discourage fly and mosquitoes.

I use rubber band like on a rubber band pistols to shoot them when they land.

Let the friendly lizard and spiders stay around the house. They will help you get rid of them.

You’ll catch some flies (and various other insects) with fly paper. The good thing is that it doesn’t smell.

Never heard of houseflies going for vinegar, AFAIK that’s for fruit flies (and even that is rather tricky IME).

Toy salt shotgun. Start hunting.

Edit: just saw another comment recommended the one i used to have. Bug-a-salt. It was the only thing that worked when we had something like 200 flies in a tiny 3-bed apt.

We got one of those electric fly swatters, but the thing is too heavy to swing fast enough to pop flies like you’d want. So on a hunch, I checked YouTube for a trick to make them more effective.

Basically take a styrofoam plate with a little food on it and tape it to the fly swatter, and zip tie the switch down and set it wherever the flies are at their worst. For bait, I just put a smear of ketchup and ranch dressing on a paper towel.

https://youtube.com/watch?v=tDZb2l2A888

We managed to kill over 30 flies in about 2 days. Heads up though, they’re not designed to be left continuously powered on, the batteries will end up dead and leaking after a couple days.

I had to toss the batteries and open up the swatter handle to clean out the battery juice off of the terminals so it won’t rot out.

But hey, aside from the inconvenience with the batteries, the trick just freaking works 👍

Play wildly upbeat frantic fly punk music and when they’re all worn out from shaking their little fly asses - nab 'em.

A clear plastic cup and a paper card large enough to cover the opening… Wait for the fly to land on a window, and approach slowly with the cup while distracting them with your other hand. When close, cover the fly by pressing the cup on the window and slip the card underneath the opening. It helps if the fly has tired itself out first. Works well for all manner of bugs.

I bought a couple of these for around the house. https://a.co/d/5vjsVs3 Works very well but mostly at night.

Also to make sure you regularly do the dishes, take out trash and clean up any food sources for the flies. After using the above and doing the above, mine went from insanity to maybe 1 or 2 around the house in about a week or two.