There are new rules regarding identification needed for air travel within the U.S. Until October 2020, the requirements will vary depending on which state you live in or where your driver's license is issued, so please check information periodically for changes. Please see the DHS's REAL ID webpage for FAQs or the TSA website for a list of acceptable forms of identification.
If you live inside the United States, visit the official Department of State U.S. Passport page for instructions.
If you live outside of the United States, please check for the passport application rules for your country.
To find out more information on obtaining a visa to visit the United States, please visit the official Department of State U.S. Visa page.