Use a fly swatter
Use sticky fly traps
Use UV electric fly traps
Spray an approved insecticide labeled for house flies
Use pyrethrin-based aerosol sprays
Set out baited fly traps
Vacuum flies with a hose attachment
Use window or door screens to prevent more flies
Remove garbage, food waste, and pet waste promptly
Clean drains and other breeding sites
Seal cracks and gaps around doors and windows
Keep food covered and surfaces clean
Use fans to make flying difficult
Call a licensed pest control professional