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Newcastle disease (ND) is highly contagious and usually causes severe illness that affects <i>Aves</i> all over the world, including domestic poultry. Depending on the virus’s virulence, it can impact the nervous, respiratory, and digestive systems and cause up to 100% mortality. The <i>chIFITM</i> genes are activated in response to viral infection. The current study was conducted to quantify the mRNA of <i>chIFITM</i> genes in vitro in response to ND viral infection. It also examined its ability to inhibit ND virus replication in chicken embryo fibroblast (CEF) cells of the Aseel and Kadaknath breeds. Results from the study showed that the expression of all <i>chIFITM</i> genes was significantly upregulated throughout the period in the infected CEF cells of both breeds compared to uninfected CEF cells. In CEF cells of the Kadaknath breed, elevated levels of expression of the <i>chIFITM</i>3 gene dramatically reduced ND viral growth, and the viral load was 60% lower than in CEF cells of the Aseel breed. The expression level of the <i>chIFITMs</i> in Kadaknath ranged from 2.39 to 11.68 log₂ folds higher than that of control CEFs and was consistently (<i>p</i> < 0.01) higher than Aseel CEFs. Similar to this, the<i>IFN-γ</i> gene expresses strongly quickly and peaks at 13.9 log₂ fold at 48 hpi. Based on these cellular experiments, the Kadaknath breed exhibits the potential for greater disease tolerance than Aseel. However, to gain a comprehensive understanding of disease resistance mechanisms in chickens, further research involving in vivo investigations is crucial.