I got a Pelican 1520. It’s very lightweight and holds the following:
P2 Camera
3 Batteries
Battery Charger & Cord
P2 Card Store
2 P2 Cards
Misc Cables
External Mic
I think Pelican makes a zippered top for the case which will hold a few more odd and ends. It’s pretty light with what I have in it which makes it noce to carry.
It WILL fit in the airline overhead compartments which is a huge bonus since I refuse to check the camera. You may be missing lights and other gear but you can still shoot if you have to.
Good luck!