Ukulele Traveling Question!?

Hello! I was thinking of flying oversees with my ukulele! But i'm a beginner and inexperienced so I have a few questions... is it better to loosen the strings if you plan to bring it as carry-on? and if so, how much should one turn the tuning pegs to loosen it? sorry if that sounds like a stupid question... but should they be turned as far as they can go or just until the strings begin to loosen? thank you in advance! :)