Since Brazil is more south from the U.S. than east or west, the time difference is much less than if you go to Europe or the Pacific. There is a 2-3 hour difference from the east coast and a 4-6 hour difference from the west coast, but it’s usually not an issue. My philosophy on jet lag is: ignore it. Some people love to talk about jet lag, I like to get outside, have a run and then get in the water and go kiting!