That passport tucked in your desk drawer may have ten years printed on it, but that does not always mean it will get you onto your next flight. If you are asking how long do passports last, the basic answer depends on the holder’s age when it was issued. The more useful answer is that your destination may require more time left on the passport than you expect.

For U.S. travelers, checking passport validity should happen before booking nonrefundable flights, hotels, or tours. A passport that expires shortly after your vacation can still create a problem at check-in or at the border.

How long do passports last for U.S. citizens?

A standard U.S. passport book is valid for 10 years when issued to an adult age 16 or older. For children under 16, a U.S. passport is valid for five years.

The same validity periods generally apply to U.S. passport cards: 10 years for adults and five years for children. A passport card is less expensive and convenient for certain land and sea crossings, but it cannot be used for international air travel. If you are flying abroad, you need a passport book.

The age on the day of application matters. A 15-year-old who applies shortly before turning 16 receives a five-year child passport, even if they will be 16 by the time it arrives. Families planning international travel should factor that shorter validity window into the timing.

There are exceptions. The State Department can issue a passport with limited validity in unusual circumstances, including some emergency situations or cases involving incomplete documentation. Always rely on the expiration date printed inside your own passport rather than assuming a full five or 10 years.

The expiration date is not the whole story

Many travelers hear about the “six-month rule” and assume it applies everywhere. It does not. Still, it is a smart planning benchmark because many countries want visitors to have at least six months of passport validity remaining beyond their arrival date, departure date, or visa expiration date.

The exact rule depends on the destination, your itinerary, and sometimes the airline. Some countries require three months of validity after you leave. Others require that your passport simply remain valid for the length of your stay. If you are transiting through another country, its rules can matter too.

This is why a passport expiring in November may be fine for one August trip and a deal-breaker for another. An airline can deny boarding before you ever leave the United States if it believes you do not meet entry requirements. That is a costly surprise when your bags are packed and the gate is calling.

A practical rule: renew when you have about six to nine months left if international travel is likely. You may be able to travel with less remaining time depending on the destination, but renewing early reduces the chance that a rule change, delayed trip, or added stop disrupts your plans.

Why airlines can be stricter than travelers expect

Airlines are responsible for transporting passengers back if a destination denies them entry. As a result, gate agents tend to follow passport and visa requirements carefully. Even a traveler who believes an exception applies may have difficulty convincing an airline employee moments before departure.

Check the entry guidance for every destination shortly before travel, especially if you are visiting multiple countries. Requirements can change, and rules for tourists may differ from those for business travelers, long-term visitors, or people entering with a visa.

When should you renew a passport?

You do not need to wait until a U.S. passport expires. In fact, waiting can make travel planning harder. Renewing well ahead of a major trip gives you breathing room for processing, mail delivery, a photo rejection, or a change in itinerary.

For a routine international trip, six to nine months before expiration is a comfortable target. If your destination specifically requires six months of remaining validity, renew before that threshold arrives. Travelers with a major trip, wedding, cruise, study program, or international work assignment on the calendar may prefer to renew even earlier.

Adult passport holders can often renew by mail or, when available and eligible, through an online renewal process. Eligibility depends on factors such as the condition of the current passport, when it was issued, and whether it was issued when you were at least 16. A passport that is damaged, heavily worn, altered, or issued with outdated personal information may require an in-person application instead.

Child passports cannot simply be renewed. When a child’s five-year passport expires, parents or guardians generally need to apply for a new passport in person with the child. That requirement is one reason family travel planning deserves a separate passport check for every traveler.

Do not book around an assumed processing time

Passport processing times can change with seasonal demand and government workload. Expedited service may help in some situations, but it is not a substitute for planning. If travel is imminent, review the current options and appointment requirements before making assumptions about what can be done.

It is also wise to leave room for the unexpected. A passport application can be delayed by a missing document, an unacceptable photo, payment issues, or an error in the form. The cheapest travel deal is not much of a deal if a passport problem prevents the trip.

What else can make a passport unusable?

A passport may be unexpired and still cause trouble. Damage is a common issue. Water exposure, torn pages, a loose cover, severe bending, unreadable information, or damage to the photo page can lead to questions at check-in or the border. Do not try to repair a damaged passport yourself.

Name changes deserve attention too. If the name on your airline ticket does not match the name on your passport, you may need supporting documentation such as a marriage certificate or court order, depending on the circumstances. For smoother travel, update the passport when practical and make sure every reservation matches the travel document exactly.

You should also check the physical pages in an older passport book. Some destinations want sufficient blank visa pages for entry and exit stamps or visas. Modern border systems have reduced the need for stamps in many places, but the requirement has not disappeared everywhere.

Finally, make sure you are carrying the right document. A passport card works for eligible land and sea entry from Canada, Mexico, Bermuda, and certain Caribbean countries, but not for international flights. A trusted traveler card, driver’s license, or birth certificate is not a replacement for a passport book when air travel rules require one.

A quick passport check before you travel

Before committing to international plans, look at your passport’s expiration date, condition, name, and available pages. Then check your destination’s current entry rules and any requirements for countries where you connect. If you are traveling as a family or group, inspect every passport individually rather than assuming everyone has the same expiration date.

Keep a clear copy of your passport information page stored securely apart from the original. It will not replace the document, but it can make reporting a lost or stolen passport easier. While traveling, protect the original from water, theft, and unnecessary wear.

Your passport is more than a photo ID with an expiration date. Treat it like a travel deadline that begins months before your departure, and you will have far more freedom to say yes when the next trip comes together.