If you have a green card, it's not necessary to carry a passport with you for domestic travel within the United States. That said, it's never a bad idea to have plenty of documentation, and if you have a passport, you may wish to keep that with you throughout your domestic travel as well.
If you wish to return to the United States lawfully after traveling outside the United States, you generally must have a: Valid entry document, such as a Permanent Resident Card (Green Card) or nonimmigrant visa; or. Valid and unexpired travel document.
As the list indicates, the TSA accepts a variety of forms of documentation for domestic flights. Notably for many foreign nationals, permanent resident cards and employment authorization cards are both acceptable forms of documentation for domestic flights.
The fastest and easiest way to apply for a travel document is as part of the original marriage green card application package you send to USCIS, by including Form I-131 (“Application for Travel Document”) along with the main forms (I-130 and I-485).
If you are a permanent or conditional permanent resident who has been outside the U.S. for one year or longer, apply for a re-entry permit before you travel. Use Form I-131 - Application for Travel Document. For permanent residents, the re-entry permit is valid for two years from the date of issue.
Lawful permanent residents must continue to present a valid Permanent Resident Card. A passport is not required.
Canadian permanent residents may need a non-immigrant visa to enter the United States. You must obtain this visa from the U.S. authorities before entering the country. You must also have a valid passport from your country of citizenship.
ESTA applications may be submitted at any time prior to travel. The processing of an ESTA can take up to 72 hours. It is also advisable to check the status of an already approved ESTA in advance of traveling to make sure that it is still valid.
485, Application to Register Permanent Residence or Adjust Status File all required initial evidence, including Form 693, Report of mmigration Medical Examination and Vaccination Record (if applicable), and supporting documentation as described in the form instructions. Use the current edition for Form 485.
Canadian permanent residents may need a non-immigrant visa to enter the United States. You must obtain this visa from the U.S. authorities before entering the country. You must also have a valid passport from your country of citizenship.