From Langkawi taxi to Langkawi, Ferry to Kuala Perlis, then bus to Alor Setar. 3hrs 17min. From Langkawi drive to Langkawi, ferry to Kuala Kedah, then drive to Alor Star. 2hrs 17min M$ 32. From Langkawi airport fly to Alor Setar airport then taxi to Alor Star. 5hrs 22min M$ 229.