I was traveling through McCarron Airport in Las Vegas and saw a notice saying you have to report anytime you transport more than $10,000.

I saw no verbiage about it having to be international travel.

Are you allowed to fly from one US destination to another without reporting more than $10k?

Also, I sometimes go on cruises and stop gambling just before I have 10k because I don't want to declare it. Can anything negative actually happen from declaring that? I wonder if they enter that info into any databases. One time, my dad handed border protection a blank customs form, and no one even noticed.