A passport is not required for domestic travel within the United States

You do not need a passport to fly between U.S. states, take a train across the country, or drive to another state. Domestic travel means staying within U.S. borders, and the federal government does not require a passport for this. What you do need depends on how you travel and which form of identification you already have.

If you are flying domestically, the Transportation Security Administration (TSA) requires a valid form of identification at the airport. A passport works, but it is not the only option. A driver's license, state ID card, or military ID will get you through security just as quickly. If you do not have any of these, you can still fly — TSA allows other documents like a birth certificate or Social Security card, though the process takes longer and you may be asked additional questions.

Key Takeaways

  • Domestic air travel requires a valid ID from TSA, but a passport is not necessary — a driver's license or state ID card works.
  • If you have no ID at all, you can still board a domestic flight by bringing a birth certificate and answering security questions, though expect delays.
  • Driving between states requires no ID at all, though police can ask for a license if you are stopped.
  • A passport becomes necessary only when you cross into Canada, Mexico, or travel by air to U.S. territories like Puerto Rico or the U.S. Virgin Islands.

What TSA accepts for domestic flights

The TSA maintains a list of acceptable IDs for domestic air travel. A driver's license or state-issued ID card is the fastest option — TSA agents scan these in seconds. A military ID, passport, passport card, or tribal ID also works. If you have any of these, bring it to the airport.

If you do not have a driver's license or state ID, other documents can work but require more time. A birth certificate, Social Security card, voter registration card, or school ID may be accepted, though TSA agents have discretion. You will likely be asked follow-up questions about your identity and the purpose of your trip. Budget an extra 15 to 30 minutes at security if you are using one of these alternatives.

Flying to U.S. territories and when a passport matters

Domestic flights to Puerto Rico, the U.S. Virgin Islands, Guam, and American Samoa are technically domestic — you are not leaving U.S. territory. However, TSA treats these routes differently. You still do not need a passport, but you do need a valid government-issued photo ID. A driver's license works the same way it does for mainland domestic flights.

A passport becomes required only when you cross an international border. If you fly from the mainland to Canada or Mexico, or take a cruise that stops in a foreign port, you will need a passport. If you are unsure whether your destination is considered domestic or international, check with your airline before booking — they can tell you what documents you need.

Driving and train travel within the United States

You do not need any ID to drive between states. Police can ask for a driver's license if they stop you, but the absence of a license does not prevent you from crossing a state line. If you are driving without a license, you risk a traffic citation, but that is a separate legal issue from travel itself.

Amtrak and other passenger trains also do not require a passport or ID for domestic travel. You will need a ticket, which you can purchase with a credit card or cash. Some routes may ask for ID when you board, but a driver's license or state ID is sufficient — a passport is not necessary.

What you need if you have no ID at all

If you have no driver's license, state ID, or passport, you can still fly domestically. Bring a birth certificate, Social Security card, or other government-issued document that shows your name and date of birth. TSA will compare this to your airline ticket and may ask you questions about your identity, travel plans, and personal details.

This process is slower and less convenient than showing a photo ID. You should arrive at the airport earlier than usual — at least two hours before a domestic flight instead of the standard 90 minutes. TSA may also conduct additional screening. If you travel frequently without a photo ID, getting a state ID card is worth the time and cost, as it will speed up every future trip.

Getting a state ID card if you do not drive

If you do not have a driver's license but want a valid photo ID for travel, you can get a state ID card from your state's Department of Motor Vehicles (DMV). This is not a driver's license — it does not let you drive — but it serves the same purpose for TSA and other identification needs. The cost varies by state, usually between $10 and $30.

To get a state ID card, visit your local DMV office with proof of identity (birth certificate, Social Security card, or passport), proof of residency (utility bill or lease), and payment. Processing times vary by state, from same-day service to several weeks. Some states offer expedited service for an additional fee. If you travel by air regularly, this is often faster and cheaper than using alternative documents at security.

International travel and passport requirements

The moment you leave the United States, a passport is required. This includes flights to Canada, Mexico, the Caribbean, or anywhere outside U.S. borders. It also includes cruises that stop in foreign ports, even if the ship departs from a U.S. port. A passport card (a smaller, wallet-sized version of a full passport) works for land and sea travel to Canada and Mexico, but a full passport is required for air travel to those countries and anywhere else.

Getting a passport takes time. Standard processing takes four to six weeks, and expedited processing takes two to three weeks. If you are planning international travel, start the passport process at least two months in advance. You will need to visit a passport acceptance facility in person with a birth certificate, proof of citizenship, government-issued photo ID, and payment.

Frequently Asked Questions

Can I fly domestically with just a birth certificate?

Yes, but TSA will ask additional questions and the process takes longer. Bring your birth certificate and airline ticket. You should arrive at the airport earlier than usual to allow time for the extra screening. A driver's license or state ID card is faster and worth getting if you travel regularly.

Do I need a passport to fly to Hawaii or Alaska?

No. Hawaii and Alaska are U.S. states, so flights there are domestic. A driver's license or state ID card is all you need for TSA security. A passport is not required unless you are connecting through a foreign country or traveling to a U.S. territory outside the mainland.

What if I lost my ID right before my flight?

You can still fly with a birth certificate, Social Security card, or other government document showing your name and date of birth. Arrive at the airport at least two hours early. TSA will ask questions to verify your identity. If you have time, getting a replacement ID from your DMV before your flight is faster than using alternative documents.

Is a passport card the same as a passport for flying?

A passport card works for land and sea travel to Canada and Mexico, but not for air travel to those countries. For air travel anywhere outside the U.S., you need a full passport book. For domestic flights, neither a passport card nor a full passport is necessary — a driver's license works fine.

Do children need a passport for domestic flights?

No. Children do not need a passport for domestic flights. TSA does not require ID for children under 18 traveling with an adult. The adult traveling with the child needs a valid ID. If a child is traveling alone or with someone other than a parent, check with your airline about their specific policies.