The ferries depart at 9:30 and 14:30 hours from Langkawi Malay Time and leave Koh Lipe at 10:30 and 16:30 hours Thai Time.
Previously, tourists must either fly in or take the passenger ferry, and those using the passenger ferry have to park their cars at either Kuala Kedah or Kuala Perlis, the two ports of embarkation.
However if you do want an option for a ferry from Kedah to Langkawi with your car, then you can take the car ferry from Kuala Perlis to Langkawi.