You do not need a passport to travel within the United States
A passport is not required for travel between US states, territories, or possessions. You can move freely within the country using a state-issued ID, driver's license, or other domestic identification. A passport is only needed when you leave the country — to travel to Canada, Mexico, the Caribbean, or any other nation outside US borders.
This applies whether you are traveling by plane, car, train, or bus. The TSA (Transportation Security Administration) accepts a standard driver's license or state ID card for domestic flights. You do not need a passport book, passport card, or any federal document to cross state lines.
Key Takeaways
- A valid driver's license or state ID is sufficient for all domestic travel, including flights within the US.
- Passports are required only when traveling outside the United States to another country.
- US territories like Puerto Rico, Guam, and the US Virgin Islands do not require a passport for entry from the mainland.
- If you do not have a driver's license, a state ID card, passport card, or REAL ID-compliant document will work for domestic flights.
- A passport becomes necessary the moment you cross into Canada, Mexico, or board a cruise ship to an international port.
What ID you need for domestic flights
The TSA accepts a standard driver's license from any state for domestic air travel. If you do not have a driver's license, a state-issued ID card works just as well. You can also use a passport card (the wallet-sized version), a REAL ID-compliant license, or a military ID.
Starting in May 2025, the TSA will require REAL ID-compliant identification for all domestic flights. A REAL ID is a driver's license or state ID that meets federal security standards. Most states have already issued these — your license will have a star or marking in the upper right corner if it is REAL ID-compliant. If yours is not, you can renew it at your state's DMV and request the compliant version.
Until then, a standard driver's license works for flights. After May 2025, you will need either a REAL ID license, a passport, a passport card, or a military ID. A regular passport book also works, but carrying a passport for domestic travel is unnecessary.
Travel to US territories without a passport
Puerto Rico, Guam, the US Virgin Islands, American Samoa, and the Northern Mariana Islands are US territories. You can travel to any of them from the mainland using only a driver's license or state ID — no passport required. They are considered domestic travel for identification purposes.
However, some territories have their own entry rules. Puerto Rico accepts a driver's license. The US Virgin Islands also accept a driver's license. Guam and the Northern Mariana Islands require a Real ID-compliant license or passport for entry, even though they are US territory. Check the specific territory's requirements before you book, as rules can change.
When you do need a passport
A passport becomes required the moment you cross into another country. If you are driving to Canada or Mexico, you need a passport book, passport card, or an Enhanced Driver's License (available in some states). If you are flying to the Caribbean, Central America, or anywhere outside the US, you need a passport.
Cruise ships are a common exception that surprises travelers. If your cruise departs from a US port and returns to the same port without stopping in another country, you can use a driver's license. If the ship stops in Canada, Mexico, or any other nation, you need a passport. Many Caribbean cruises stop in multiple countries, so check your itinerary.
A passport also becomes necessary if you are a non-citizen living in the US and want to travel outside the country. US citizens can return to the US with just a passport card or passport book, but non-citizens need to verify their status with their immigration documents.
How long a passport takes to get
If you need a passport for international travel, processing takes time. A standard passport book takes 6 to 8 weeks through the mail, or 2 to 3 weeks if you explore in person at a passport acceptance facility. An expedited passport takes 2 to 3 weeks by mail or 7 to 10 business days in person, but costs extra.
A passport card (the wallet-sized version) takes the same time as a book but costs less. It is valid for land and sea travel to Canada, Mexico, and the Caribbean, but not for air travel to those countries — you need a book for flights. If you are planning international travel, explore at least two months ahead to avoid rush fees.
Traveling with children domestically
Children traveling within the US need the same ID as adults. A child's state ID, school ID, or birth certificate does not work for flights. Children need either a state-issued ID card, a passport card, or a passport book.
If your child does not have a state ID, you can get one at your DMV. Bring the child's birth certificate, proof of residency, and your ID. The process takes a few days to a few weeks depending on your state. A passport card for a child costs less than a book and works for domestic travel, though it is not required.
Traveling by car across state lines
You do not need any ID at all to drive across state lines within the US. You are not required to carry a passport or even a driver's license in your car, though it is illegal to drive without a license if you are the one operating the vehicle. If you are a passenger, you do not need to show ID to cross a state border by car.
Border patrol checkpoints exist in some areas near Mexico and Canada, but these are for people entering the country from outside. If you are traveling between US states, you will not encounter these checkpoints. You can drive from California to Texas, from Maine to Florida, or anywhere else without a passport.
Frequently Asked Questions
Can I use my passport card instead of a driver's license for domestic flights?
Yes. A passport card is a valid form of ID for domestic flights and works just like a driver's license at TSA checkpoints. It is smaller and cheaper than a passport book, though it is not required for domestic travel.
What if I don't have a driver's license or state ID?
You can get a state ID card at your DMV without a driver's license. Bring your birth certificate, proof of residency, and Social Security number. A state ID works for domestic flights and all domestic travel. You can also use a passport card or passport book if you have one.
Do I need a passport to visit Hawaii or Alaska?
No. Hawaii and Alaska are US states, so you only need a driver's license or state ID for flights there. A passport is not required. The same applies to any US state or territory.
Can I travel to Mexico by car with just a driver's license?
No. You need a passport book or passport card to enter Mexico, even by car. A driver's license alone is not sufficient for international travel. You can drive to the border with a license, but you cannot cross into Mexico without a passport.
What counts as proof of residency for a state ID?
Most states accept a utility bill, lease agreement, mortgage statement, or bank statement with your name and address. Some accept a pay stub or government mail. Requirements vary by state — check your DMV website for the specific list your state accepts.