We analyze the major trade blocks in Western Hemisphere and their effects on intra-regional trade flows using data for the period 1980-2006. We use an augmented gravity model to estimate the effect of various trade blocks on trade flows within and across membership other Western Hemispheric countries. The findings of this study are consistent with findings of previous studies on Western Hemisphere trade flows and shed some light on whether the proposed Free Trade Area of the Americas is beneficial or not for Western Hemispheric countries.