Hm, Since i'm a big traveler, it will depend what airline you'll go on. If it's Continental, Bring a laptop and some computer games. But still, Cleverbot for your phone.
Frontier there, American back.
And I don't have a laptop and Cleverbot costs money and would get really boring really fast.
EDIT: Ughhh, I just realized I can't even listen to music because Pandora and Grooveshark require internet connections. :(