i'm not 100% sure what the restrictions are.. though i brought my europass match ball with me
i'd advise you:
1. deflate it
2. bring a pump
3. put it in your suitcase
don't deflate it too much though, because when i took it out and pumped it.. it had all these creases and stuff on it but after like a week they are nearly invisible
i wouldn't risk losing a match ball.. because at security checks and stuff at airports you can't even take drinks with you..