<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by holland:
My brother recently returned from several months on tour with a band. He'd been cashing pay checks and living on the tour bus so had several thousand dollars in cash wadded up in his carry-on bags. The security guy for a domestic flight took it all out and demanded to know how much money he had there, and if he always carried that much, etc. He got the third degree, especially after telling the guy he didn't know the exact figure, but it was a "couple thousand"... and this wasn't even a customs agent (domestic flight)!</font>
Domestically, you can have any amount of cash you wish to have in your possession on your person or in your belongings. It may require transactional reporting, but you are still allowed to have it and carry it domestically. It may still make you suspect (for at least being foolish if not criminal) in many people's eyes.