Before your arrival in the U.S., ensure that your J1 visa is valid and corresponds to the program dates listed on your Form DS-2019. Your sponsor should provide you with relevant travel information. As a J1 visa holder, you have a 30-day grace period for travel within the United States after your program ends. However, re-entry after international travel during the grace period is at the discretion of U.S. Customs and Border Protection.