This study uses a detailed product-level data to examine the trade deflection of Korean exports as a result of antidumping (AD) duty impositions. Given that APEC economies account for a large share of Korean exports and AD duty impositions on Korean exports, especially by the U.S. and China, this study focuses on the deflection of Korean export to APEC economies following the imposition of AD duties by the U.S. and China. This study finds robust evidence of Korean export deflection within APEC as a result of the imposition of AD duties by the U.S. and China. Moreover, intra-APEC trade deflection is associated with the type of products involved in the AD duty orders. U.S. AD duties have an impact on the export deflection of intermediate products, while Chinese AD duties have an impact on final products, towards APEC economies.