From Alor Setar taxi to Alor Setar airport then fly to Langkawi airport. 3hrs 30min M$ 254. From Alor Setar drive to Kuala Kedah, ferry to Langkawi, then drive to Langkawi Airport (LGK). 1hrs 28min M$ 29. From Alor Setar bus to Kuala Perlis, ferry to Langkawi, then taxi to Langkawi Airport (LGK). 3hrs 06min M$ 97.