Travel within the United States
When traveling within the United States you are advised to carry your Form I-94, your passport and your I-20 or DS-2019 with you. Form I-94 is a form denoting the Arrival-Departure Record of particular foreigners used by U.S Customs and Border Protection (CBP)
For many years, a regulation has existed which states that international visitors to the U.S. (including students and scholars) must carry their "registration document" with them. This regulation was not very well known and was rarely enforced. With increased security precautions, particularly at airports, it is advisable for students and scholars to make sure that they are in compliance with this regulation. The "registration document" for F-1 and J-1 students and scholars is Form I-94.
Travel Outside the U.S. While on F1 or J1 Visa
For up-to-date information on traveling outside the U.S. and re-entry, please visit the Immigration and Customs Enforcement website: www.ice.gov/sevis/travel