Recent advances in understanding the antibacterial properties of flavonoids highlight their potential as therapeutic agents against antibiotic-resistant bacteria. Flavonoids, plant-derived compounds, exhibit direct antibacterial activity, synergism with antibiotics, and suppression of bacterial virulence. The review identifies the ten most antibacterial flavonoids and five most synergistic flavonoid-antibiotic combinations from the last six years. Panduratin A shows MICs as low as 0.06 to 2.0 μg/mL against Staphylococcus aureus, while epicatechin gallate reduces oxacillin MICs by up to 512-fold. Flavonoids also inhibit bacterial virulence factors, including quorum sensing, enzymes, and toxins. In vitro studies show flavonoids inhibit biofilm formation, bacterial attachment, and neutralize toxicity to human cells. In vivo, they demonstrate efficacy against Helicobacter pylori and S. aureus α-toxin intoxication. Flavonoids exhibit direct antibacterial activity through mechanisms such as cytoplasmic membrane damage, inhibition of nucleic acid synthesis, and energy metabolism disruption. Synergistic activity with antibiotics is achieved through mechanisms like β-lactam resistance modulation and inhibition of bacterial virulence factors. Flavonoids also inhibit bacterial pathogenicity by disrupting quorum sensing, sortase activity, urease, listeriolysin O, and bacterial toxin neutralization. These effects are supported by in vitro and in vivo studies, though challenges remain in accurately determining bactericidal activity due to bacterial aggregation. Structure-activity relationships indicate that certain substitutions and modifications enhance antibacterial activity. Flavonoids like galloyl flavan-3-ols and semi-synthetic derivatives show significant synergistic activity with antibiotics. However, the exact mechanisms of action remain unclear, with some studies suggesting multiple mechanisms rather than a single one. Future research should focus on identifying specific targets and improving the accuracy of in vitro assays to better predict in vivo efficacy. Flavonoids show promise as antivirulence agents, but their clinical application requires further investigation into their mechanisms and potential for resistance development. Overall, flavonoids represent a valuable area of research for developing new antibacterial therapies.Recent advances in understanding the antibacterial properties of flavonoids highlight their potential as therapeutic agents against antibiotic-resistant bacteria. Flavonoids, plant-derived compounds, exhibit direct antibacterial activity, synergism with antibiotics, and suppression of bacterial virulence. The review identifies the ten most antibacterial flavonoids and five most synergistic flavonoid-antibiotic combinations from the last six years. Panduratin A shows MICs as low as 0.06 to 2.0 μg/mL against Staphylococcus aureus, while epicatechin gallate reduces oxacillin MICs by up to 512-fold. Flavonoids also inhibit bacterial virulence factors, including quorum sensing, enzymes, and toxins. In vitro studies show flavonoids inhibit biofilm formation, bacterial attachment, and neutralize toxicity to human cells. In vivo, they demonstrate efficacy against Helicobacter pylori and S. aureus α-toxin intoxication. Flavonoids exhibit direct antibacterial activity through mechanisms such as cytoplasmic membrane damage, inhibition of nucleic acid synthesis, and energy metabolism disruption. Synergistic activity with antibiotics is achieved through mechanisms like β-lactam resistance modulation and inhibition of bacterial virulence factors. Flavonoids also inhibit bacterial pathogenicity by disrupting quorum sensing, sortase activity, urease, listeriolysin O, and bacterial toxin neutralization. These effects are supported by in vitro and in vivo studies, though challenges remain in accurately determining bactericidal activity due to bacterial aggregation. Structure-activity relationships indicate that certain substitutions and modifications enhance antibacterial activity. Flavonoids like galloyl flavan-3-ols and semi-synthetic derivatives show significant synergistic activity with antibiotics. However, the exact mechanisms of action remain unclear, with some studies suggesting multiple mechanisms rather than a single one. Future research should focus on identifying specific targets and improving the accuracy of in vitro assays to better predict in vivo efficacy. Flavonoids show promise as antivirulence agents, but their clinical application requires further investigation into their mechanisms and potential for resistance development. Overall, flavonoids represent a valuable area of research for developing new antibacterial therapies.