Take it in-cabin if you can -- call the airline to make sure you can do this. And even if they say you can, be sure to take the strings off the guitar and ship

Take it in-cabin if you can -- call the airline to make sure you can do this. And even if they say you can, be sure to take the strings off the guitar and ship them separately. Some security people consider them weapons so if you're transferring and need to go through security at a different airport that can cause problems.