Some aitlines won't allow you to bring it onboard. So you have to check it in. You can either pack it into your main luggage or as a seperate bag. Think the tripod bag should be sufficient.... unless you are afraid that it will be damaged.
I always wrap mine in a beach towel and then put in tripod bag and check it in. That being said, it got a couple of dents from the last trip. Baggage handlers must've really knocked it about cos it's quite sturdy.
I have a Manfrotto bag for my 190 but don't think it offers too much protection although the tripod is much easier to carry around. For protection, I recycle those A4 bubble pack envelopes: one wrap around the tripod head, the other around the legs, and place it in my hard luggage casing. No problems so far with that method of carrying.