A passport works for domestic flights, but Real ID is simpler for most travelers

Yes, you can use a passport instead of a Real ID to board a domestic flight. A valid U.S. passport is one of the few documents the Transportation Security Administration (TSA) accepts at airport security checkpoints, alongside Real ID driver's licenses and a handful of other forms of federal ID. If you already have a passport and it is not expired, you do not need to get a Real ID just to fly domestically.

That said, Real ID is often more convenient for regular air travelers. You carry your driver's license anyway, so you do not need to remember a second document. Real ID also works for entering federal buildings and military bases, which a passport does not. But if you travel by air only once or twice a year and have a passport, there is no requirement to switch.

Key Takeaways

  • A valid U.S. passport satisfies TSA requirements for domestic flights and is an acceptable alternative to Real ID.
  • Real ID is required for domestic flights only if you do not have a passport or another accepted federal ID.
  • A passport must not be expired to work at airport security; an expired passport will be rejected.
  • Real ID works for federal buildings and military bases in addition to flights, while a passport does not.
  • You cannot use a passport for driving or for state ID purposes — Real ID serves both functions at once.

What documents TSA accepts at airport security

The TSA maintains a list of documents that work for domestic flights. A valid U.S. passport is on that list. So are a Real ID driver's license, a military ID, a federal employee ID, a tribal ID, and a handful of others. The key word is valid — your passport must not be expired. An expired passport will not get you through security, even if you have years left before you would need to renew it for international travel.

If you have a passport and it is current, you have met the TSA requirement. You do not need Real ID for that specific purpose. The confusion often comes from the fact that Real ID is required for federal buildings and military bases starting in 2025, which makes people think it is required everywhere. It is not — it is required only for those specific federal facilities and for domestic flights.

Why Real ID might still be worth getting

Even though a passport works for flights, Real ID has practical advantages for most people. A Real ID driver's license or state ID card is something you carry anyway. You do not have to remember to bring your passport to the airport or worry about it getting lost or damaged in your bag. If you fly more than once or twice a year, the convenience adds up.

Real ID also works for entering federal buildings, federal courthouses, and military bases — places where a passport does not work. If you have any reason to visit those locations, Real ID covers both flying and building access with a single document. A passport only covers flights.

Getting Real ID does require a trip to your state's DMV and proof documents, but most people renew their driver's license every few years anyway. You can add Real ID to that renewal or get it on its own. The cost varies by state but is usually between $15 and $30 extra.

Passport requirements for airport security

Your passport must be a valid U.S. passport book — not a passport card. A passport card is a smaller, wallet-sized version that works for land and sea travel to Canada, Mexico, and the Caribbean, but the TSA does not accept it at airport security for domestic flights. You need the full passport book.

The passport must not be expired. The expiration date is printed on the information page. If today's date is past that date, TSA will reject it. You cannot use an expired passport even if you are in the process of renewing it or have already submitted a renewal process.

You do not need a passport for any other reason to use it at airport security — it does not matter whether you have international travel plans. If you have a valid passport book, that is enough.

When you might want a passport over Real ID

A passport is the better choice if you travel internationally at all. Real ID does not work for international flights or for entering most countries. If you fly to Canada, Mexico, or anywhere else outside the U.S., you need a passport regardless. Getting both a Real ID and a passport means carrying two documents and renewing both on different schedules.

A passport is also the better choice if you do not drive or do not want to renew your driver's license right now. If your license is not expiring soon and you fly only occasionally, renewing your license just to add Real ID may not be worth the trip to the DMV. A passport you already have works fine for those occasional flights.

If you are under 18 and your parents handle your documents, a passport may already be in your possession. You can use it for flights without needing to get a Real ID until you are old enough to drive or need to enter a federal building.

Traveling with a passport: what to bring

Bring your passport book in its original form — do not laminate it or put it in a plastic sleeve. TSA officers need to see the security features clearly. Arrive at the airport with enough time to get through security; passport verification sometimes takes a moment longer than a Real ID because the officer has to check more pages.

You do not need to bring anything else to prove your identity for a domestic flight. A passport is a federal document and is sufficient on its own. You do not need a second form of ID or any other paperwork.

If your passport is damaged — torn, water-damaged, or with pages missing — do not try to use it. TSA may reject it, and you could miss your flight. If you discover damage before your trip, contact the State Department's passport agency to see whether it can be used or needs to be replaced.

Real ID timeline and when you might need it

Real ID is required for entering federal buildings and military bases as of May 7, 2025. It is not required for domestic flights if you have a passport or another accepted form of federal ID. However, if you do not have a passport and you do not want to get one, Real ID is the easiest alternative for flying domestically.

If you are planning to get Real ID, start the process at your state's DMV. You will need to bring documents like a birth certificate, proof of address, and your current driver's license. Processing times vary by state — some issue Real ID on the spot, while others mail it to you and take several weeks. Plan ahead if you need it by a specific date.

Frequently Asked Questions

Can I use an expired passport at airport security?

No. TSA requires the passport to be valid and not expired. Check the expiration date on the information page before you go to the airport. If it is expired, you will need a different form of ID or you will not be able to board your flight.

Does a passport card work instead of Real ID?

No. TSA does not accept passport cards at airport security for domestic flights. You need a full passport book. Passport cards work for land and sea travel to Canada, Mexico, and the Caribbean, but not for airport security.

Do I need Real ID if I have a passport?

Not for domestic flights. A valid passport is enough. You would only need Real ID if you want to enter federal buildings or military bases, or if you prefer to use your driver's license instead of carrying a separate document to the airport.

What if my passport is damaged or falling apart?

Do not use it at airport security. Contact the State Department's passport agency or your local passport acceptance facility to find out whether it can be repaired or needs to be replaced. Trying to use a damaged passport may result in TSA rejecting it and you missing your flight.

Can I use my passport for domestic flights if I am under 18?

Yes. A valid passport works for anyone, regardless of age. You do not need Real ID or a driver's license to fly domestically if you have a current passport.