I found a really sturdy tripod (okay, it had 4 legs) at the end of the Champs Elysee, but it was a bit too big for my luggage, and I assure you French security would not let me through.
Okay, seriously .... consider a sturdy monopod instead. You will have no problem taking it as carry-on so long as the foot is not a long sharp spike. Mine fits inside my carry-on size roller bag and has flown with me multiple times to Europe (including Paris), South America and all over the home country of the Transportation Security Agency. Tripods are typically not permitted inside most museums, but I have never been stopped with my monopod - especially since I boldly walk in with my camera unmounted and using my monopod as a walking stick (again make sure there is no exposed spike at the foot). I use a quick release, and I also carry a 1m roll of self-sticking Velcro tape. If a rock steady mount is needed, I use the Velcro tape and lash my monopod to a park bench, a lamp pole, a tree, you get the idea.
Oh, here is that really sturdy 4-legged tri (quad?) pod I mentioned...