The ideal length of stay in Langkawi depends on what you want to do and see. If you want to relax and enjoy the beaches, a 3-4 night stay may be sufficient. However, if you plan to explore the island's natural attractions, go on tours, and try various activities, a longer stay of 5-7 nights may be more appropriate. Ultimately, it's up to personal preference and the amount of time and budget available for your trip to Langkawi.