You will be well served to go the the airlines website and read their travel instructions. The last time we travelled, they were quite thorough. All the above comments are right on, from my limited travel experiences. You don't want to put anything of value in checked bags. If TSA can get in, anyone can. and do. I no longer lock my luggage after noting that all the locks I bought have the same key, or so cheap anyone can open them. All my meds and valuables go in my carry on briefcase.