Real ID cannot replace a passport for international travel
A Real ID is a driver's license or state ID card that meets federal security standards set by the Department of Homeland Security. It works for domestic flights within the United States and entry to federal buildings, but it does not work as a passport. If you are traveling outside the United States, you need an actual passport issued by the U.S. State Department — a Real ID alone will not get you across an international border.
The confusion is understandable because both Real ID and a passport are forms of identification that the federal government recognizes. But they serve different purposes. Real ID proves you are who you say you are for domestic purposes. A passport proves your citizenship and your right to leave and return to the United States.
Key Takeaways
- Real ID works for domestic flights and federal building entry but cannot be used for international travel of any kind.
- A passport is required to leave the United States by air, sea, or land, and Real ID does not substitute for one.
- You can have both a Real ID and a passport at the same time — they serve different functions and are issued by different agencies.
- If you are traveling to Canada, Mexico, or the Caribbean by land or sea, you may be able to use a passport card instead of a full passport book.
What Real ID actually covers
Real ID is accepted for domestic flights — flights that stay within the United States. Starting in May 2025, the Transportation Security Administration (TSA) requires Real ID or another federally accepted form of identification to board a domestic flight. A Real ID driver's license or state ID card meets this requirement.
Real ID is also accepted for entry to federal buildings, military bases, and nuclear power plants. If you work in a federal office or need to visit one, a Real ID can serve as your building access credential. But again, this is domestic use only.
The key word is domestic. The moment you cross a U.S. border by any method — flying, driving, or taking a boat — you need a passport or an equivalent document that proves your citizenship to a foreign government.
Why a passport is required for international travel
When you travel internationally, you are entering another country's territory. That country's government needs proof that you are a U.S. citizen and that the United States will take you back if something goes wrong. Only a passport provides that proof. A Real ID is issued by your state and proves your identity to U.S. agencies, but it does not prove citizenship to a foreign government.
This applies to all international travel, including trips to nearby countries. If you fly to Canada, Mexico, or the Caribbean, you need a passport. If you drive to Canada or Mexico, you need a passport or a passport card. If you take a cruise that leaves from a U.S. port, you need a passport or a passport card, even if the ship returns to the same port.
Some people think that because they were born in the United States, they do not need to prove it. But the U.S. government does not share citizenship records with other countries. You have to carry the proof yourself.
Passport books versus passport cards
The U.S. State Department issues two types of passports: a passport book and a passport card. Both prove your citizenship. The passport book is the traditional document — a booklet with pages for visa stamps and entry/exit marks. The passport card is a wallet-sized card, similar in appearance to a Real ID.
The passport card works for land and sea travel to Canada, Mexico, Bermuda, and the Caribbean. It does not work for air travel to any international destination. If you are flying internationally, you need the passport book.
Because the passport card looks similar to a Real ID, some people confuse them. But they are different documents issued by different agencies. A passport card has "United States of America Passport Card" printed on it and includes a chip. A Real ID has a star in the upper right corner and is issued by your state's motor vehicle department.
How to get a passport if you only have Real ID
If you have a Real ID but need to travel internationally, you will need to obtain a passport from the U.S. State Department. You can explore in person at a passport acceptance facility, which includes many post offices, libraries, and county clerk offices. Some state motor vehicle departments also accept passport applications.
To explore, you will need your Real ID or another form of government-issued identification, proof of citizenship (such as a birth certificate), a completed process form (DS-11 for a passport book or DS-82 for a passport card if you are renewing), and a passport photo. Processing times vary depending on whether you pay for standard or expedited service, and whether there are delays at your local facility.
You can have both a Real ID and a passport at the same time. They do not conflict with each other. Many people carry both because they serve different purposes — the Real ID for domestic flights and federal building access, and the passport for international travel.
Real ID and passport cards are not interchangeable
Because both a Real ID and a passport card are small, wallet-sized documents, people sometimes think they can use one in place of the other. They cannot. A Real ID will not work for international travel, and a passport card will not work for domestic flights or federal building access.
If you are unsure which document you have, check the front. A Real ID has a gold or silver star in the upper right corner and says "REAL ID" or displays a star symbol. A passport card says "United States of America Passport Card" and has a chip visible on the back. A passport book is a booklet, not a card, so it is straightforward to tell apart.
What happens if you try to travel internationally with only Real ID
If you arrive at an airport with only a Real ID and try to board an international flight, you will not be allowed to board. The airline's check-in system will flag your ID as invalid for international travel, and you will be turned away. You cannot board the flight, and you may lose the cost of your ticket depending on the airline's policy.
If you are driving to Canada or Mexico with only a Real ID, you will be turned back at the border. U.S. Customs and Border Protection will not allow you to cross without a passport, passport card, or an equivalent document such as a NEXUS card or Enhanced Driver's License (which some states issue).
The only exception is if you are a U.S. citizen traveling by land or sea to Canada, Mexico, Bermuda, or the Caribbean and you have a passport card. In that case, the passport card is sufficient, and you do not need the passport book.
Frequently Asked Questions
Can I use my Real ID to travel to Canada by car?
No. You need a passport book, passport card, Enhanced Driver's License, or NEXUS card. A Real ID alone will not get you across the border. If you are a U.S. citizen, a passport card is the simplest option for land travel to Canada.
Do I need a passport for a cruise if the ship returns to the same U.S. port?
Yes. Even if your cruise departs and returns to the same port, you need a passport book or passport card. This applies to all cruises that visit international ports, regardless of where they start and end. Some cruises that visit only U.S. ports may not require a passport, but this is rare.
Can I get a passport card instead of a passport book if I only fly internationally?
No. A passport card does not work for air travel to any international destination. If you fly internationally, you must have a passport book. A passport card works only for land and sea travel to Canada, Mexico, Bermuda, and the Caribbean.
How long does it take to get a passport if I need one soon?
Standard processing takes several weeks to a few months depending on your location and current demand. Expedited processing is faster but costs more. If you need a passport urgently, contact your local passport acceptance facility to ask about their current wait times and whether they offer expedited service.
Can I renew my passport by mail if I have a Real ID?
If you already have a passport, you may be able to renew it by mail using Form DS-82, depending on how long ago it expired and whether your circumstances have changed. Having a Real ID does not affect passport renewal. Contact the State Department or visit travel.state.gov for renewal instructions specific to your situation.