What Is a Travel ID and When You'll Need One

A travel ID is a government-issued document that proves your identity and citizenship when you cross a border or board a domestic flight

The most common travel IDs in the United States are a passport, passport card, Real ID-compliant driver's license, or enhanced driver's license. Each one serves the same basic purpose: to confirm who you are to a border agent or airline staff. The document you need depends on where you're traveling and how you're getting there.

For domestic flights within the U.S., you can use a standard driver's license, passport, or military ID. For international travel by air, you need a passport or passport card. If you're driving across the Canadian or Mexican border by car, an enhanced driver's license or passport works; a standard driver's license does not. Understanding which document works for your specific trip prevents delays at the airport or border.

Key Takeaways

A passport is the only travel ID accepted for all international air travel and works for land border crossings to Canada and Mexico.
A Real ID-compliant driver's license works for domestic U.S. flights and some land border crossings, but not for international air travel.
An enhanced driver's license allows you to drive across the Canadian or Mexican border without a passport, though not all states offer them.
Passport processing takes four to six weeks for routine service and two to three weeks for expedited service; plan ahead if you don't have one.

Passport vs. Real ID Driver's License

A passport is a booklet issued by the U.S. State Department that proves your citizenship and identity. It works everywhere: domestic flights, international flights, and land border crossings. A passport card is a smaller, wallet-sized version that works for land and sea travel to Canada, Mexico, Bermuda, and the Caribbean, but not for air travel outside the U.S.

A Real ID-compliant driver's license is a state-issued ID that meets federal security standards set by the Department of Homeland Security. You can spot one by a small star or marking in the upper right corner. It works for domestic flights and some land border crossings, but the federal government does not accept it for international air travel. If you're flying internationally, you must have a passport.

The main difference for travel planning: a passport takes weeks to obtain and costs money, but it works everywhere. A Real ID driver's license is faster to get if you already have a standard license (you just renew it at your state's DMV), but it has geographic limits.

Enhanced Driver's Licenses and Land Border Crossings

An enhanced driver's license is a state-issued ID that contains an embedded radio frequency chip with your citizenship information. It allows you to drive across the land border into Canada or Mexico without carrying a passport. Not all states offer them—currently, about 17 states issue enhanced licenses, including Washington, Michigan, New York, and Vermont.

If your state offers an enhanced license, you can obtain one by visiting your state's DMV with proof of citizenship (a birth certificate or passport), proof of residency, and a valid standard driver's license. The process is similar to renewing a regular license, though the fee is higher—usually between $20 and $50 more than a standard renewal. Processing time varies by state but typically takes two to four weeks.

An enhanced license does not work for air travel, even domestic flights. It is only for land and sea border crossings. If you plan to fly internationally, you still need a passport.

Military ID and Other Government-Issued Documents

A military ID issued by the Department of Defense works as a travel document for domestic flights and some land border crossings. If you are active duty, retired military, or a dependent with a valid military ID, you can use it instead of a driver's license or passport for domestic air travel.

A Native American tribal ID may also work for land border crossings to Canada if it is issued by a federally recognized tribe and contains a photograph and signature. However, it does not work for air travel. Check with your tribe's enrollment office or the U.S. Customs and Border Protection website to confirm whether your specific tribal ID meets current requirements.

How Long It Takes to Get a Passport

Standard passport processing through the U.S. State Department takes four to six weeks. Expedited processing takes two to three weeks and costs an additional $60. Expedited service does not include a rush delivery fee; if you need the passport in hand faster, you can pay extra for overnight shipping.

If you need a passport in fewer than two weeks, you must explore in person at a passport acceptance facility or passport agency. Some agencies offer same-day or next-day service for an additional fee, but availability is limited and you must have a documented travel date within 14 days. Check the State Department website to find the nearest passport agency and call ahead to confirm they offer expedited in-person service.

Passport card processing follows the same timeline as a passport book. If you already have a valid passport and only need a card, you can explore by mail and may see faster processing, but this varies by location.

What Documents You Need to Prove Citizenship

To obtain a passport or enhanced driver's license, you must prove U.S. citizenship. Acceptable documents include a birth certificate (original or certified copy), naturalization certificate, or a previous passport. A standard driver's license, Social Security card, or school ID does not prove citizenship on its own.

You will also need to prove your identity (a current driver's license works) and residency (a utility bill, lease, or bank statement with your current address). Bring originals or certified copies—photocopies are not accepted. If your birth certificate is more than 10 years old or was issued in a different state, order a certified copy from the vital records office in the state where you were born; this can take one to two weeks.

Traveling Without a Passport: What Works and What Doesn't

If you do not have a passport, you can still travel domestically by air with a Real ID driver's license, standard driver's license, military ID, or passport card. You cannot travel internationally by air without a passport or passport card.

For land travel to Canada or Mexico, a Real ID driver's license works, but only if you are driving or crossing on foot. An enhanced driver's license is better because it streamlines the border crossing process. A standard (non-Real ID) driver's license does not meet federal requirements for land border crossings and will be rejected.

If you are traveling internationally by sea (cruise ship), a passport card works for closed-loop cruises that depart and return to the same U.S. port. For open-loop cruises or any cruise that stops at a foreign port and returns to a different U.S. port, you need a full passport book.

Frequently Asked Questions

Can I use my passport card for a domestic flight?

Yes. A passport card is a valid travel document for domestic flights within the United States. However, it does not work for international air travel. If you are flying outside the U.S., you need a full passport book.

Do I need a Real ID to fly domestically after 2025?

Yes. Starting May 7, 2025, the federal government requires all passengers on domestic flights to present either a Real ID driver's license, passport, military ID, or other federally approved ID. A standard driver's license will no longer be accepted. Check your state's DMV website to see if your current license is Real ID-compliant or if you need to renew it.

What if my state doesn't offer an enhanced driver's license?

If your state does not issue enhanced licenses, you can still cross the land border into Canada or Mexico by car if you have a passport or passport card. Some states are working to introduce enhanced licenses, so check your state's DMV website to see if this option is becoming available.

How much does a passport cost?

A passport book costs $130 for adults (plus a $35 execution fee if explore in person for the first time). A passport card costs $100 (plus the $35 execution fee). Expedited processing adds $60. Fees vary slightly for minors and renewals. Check the State Department website for the most current pricing.

Can I renew my passport by mail if it's expired?

Yes, if your passport is undamaged, was issued when you were 16 or older, and expired fewer than five years ago. You can renew by mail using Form DS-82. If your passport is older than five years expired or was issued before age 16, you must explore in person. Processing by mail takes four to six weeks.

This guide is for general information only and is not medical, financial, legal, or other professional advice. For decisions specific to your situation, consult a qualified professional. See our Editorial Policy.