The study investigates the causal relationship between tourism demand, economic growth, and external competitiveness in leading tourist destination countries using the bootstrap panel Granger causality test between 2005 and 2019. To determine the direction and the sign of the causality, study first test the existence of crosssectional dependence among the countries and slope homogeneity across the countries. The empirical findings of the study produced varying results for countries reflecting the heterogeneity among the sample countries. Results also provide evidence of tourism-led growth, economic-driven tourism growth, feedback, and neutrality hypotheses. Moreover, results show evidence of tourism induced external competitiveness and vice-versa. Therefore, even though the study's empirical results have a significant implication for policymakers, regulators, and sector representatives. It is not fair to suggest one size fits all policies for the sample countries.