Background, I travel around the northern hemisphere for months at a whack. My
Sirui tripod is small enough to fit into my carry on. However, as I get more equipment it's moving to the outside of my
Think Tank Airport International.
That said, I'm running into more cases of small domestics and major international airlines holding firm to the 7kg or 10kg carry on weight limit for carry on bags. Despite it being photography gear and not insured by the airline enough, they still demand it be checked in. As a work around, my main body and lenses ride on my waist via
Think Tank Photo Digital Holster or a
Think Tank Photo Change Up when used a s a belt pack.
Further, I'm starting to see more security checks actually have signage and videos saying "No Tripods". I think the latest was Macau and Calgary in the past month.
Wrapping up, there's probably no trouble with sticking the tripod into or securely on your carry on bag. However, free holding it might mean it's need to be checked.
Good luck and happy travels.