Plant defense mechanisms against fungal infections involve a complex interaction between phytohormones and reactive oxygen species (ROS). Upon encountering infection, a plant activates multiple hormonals signaling pathways, particularly those associated with salicylic acid (SA), jasmonic acid (JA), and ethylene (ET). The hormones collaborate to regulate the production and removal of reactive oxygen species, thereby maintaining a critical equilibrium between localized hypersensitive responses and systemic acquired resistance. Recent advancements in transcriptomics, proteomics, and metabolomics have improved our understanding of the role of redox signaling in hormone production, receptor activation, and subsequent gene expression. The regulatory role of hormones in ROS production, mediated by NADPH oxidases and antioxidant enzymes, establishes a feedback loop that connects the plant's stress perception to its defense mechanisms. This study synthesizes the physiological and molecular mechanisms involved in these interactions, highlighting essential regulatory nodes, transcription factors, and signaling networks that are crucial for coordinating plant resistance to fungal infections. Enhancing our comprehension of this signaling system allows for the exploration of novel strategies to develop crops with increased resistance via targeted modifications of hormone–ROS interactions. These advancements have significant potential to improve agricultural resilience and sustainability.