Travel in the U.S.
When you are traveling in the U.S, we recommend that you carry a copy of your passport and Form I-20 or DS-2019 with you. These documents are required to show proof of lawful legal presence in the United States. This is equally necessary (original copies), if you will be flying to another State within the United States.
For more information about the required documents for air travel please visit U.S Homeland Security – Transportation Security Administration.