Flies can be a nuisance, but there are natural ways to keep them away from your home. Some plants, such as lavender, eucalyptus, marigolds, basil, and mint, have strong scents that flies find repelling. These plants can be placed inside your home or near windows and doors to deter flies from entering. In addition to using plants, there are other ways to keep flies away from your home, such as keeping your home clean, disposing of food waste properly, and cleaning out drains regularly.