Can You Travel Without a Passport? U.S. Citizens’ Options in 2026
Explore U.S. citizens’ passport-free and passport-book alternatives, with domestic ID, territory, cruise and border rules.
Quick Answer
Sometimes. U.S. citizens can travel within the 50 states without a passport and can visit certain U.S. territories on a route that does not pass through a foreign country. Some closed-loop cruises allow alternatives, subject to destination and cruise-line rules. Adults flying domestically need TSA-accepted ID; children under 18 generally do not need ID for TSA screening on domestic flights.
For ordinary international flights, carry a passport book. Limited NEXUS air exceptions exist between the U.S. and Canada. A passport card is a passport document, even though it is not a booklet; “without a passport book” and “without any passport” are different claims.
Can You Travel Without a Passport? It Depends on How You Travel
| Travel route | Passport book required? | What to check |
|---|---|---|
| Domestic flight within the 50 states | No | TSA-accepted adult ID; airline rules for children |
| U.S. territory without foreign transit | Often no | Territory, airline and citizenship-proof requirements; American Samoa has separate rules |
| Ordinary international flight | Yes | Limited NEXUS exceptions do not create a general passport-free option |
| Eligible closed-loop cruise | Sometimes no | Citizenship proof and photo ID requirements, destination rules and cruise-line policy |
| Land/sea return from Canada or Mexico | Alternatives may apply | WHTI-compliant document or a specific exception; foreign entry rules are separate |
| One-way or different-port cruise | Usually yes | Confirm every destination and carrier requirement |
A regular license plus a birth certificate is not a general adult land-border return document. A REAL ID is not proof of citizenship.
What ID You Need to Fly Domestically in 2026
For travelers 18 and older, since May 7, 2025, TSA has required a REAL ID-compliant license or ID, or another accepted document such as a passport or passport card, to board a domestic flight.
If you arrive at the airport without either one, TSA offers an alternative identity check called ConfirmID. Since February 1, 2026, it costs $45 and is paid online through pay.gov. The fee covers a 10-day travel period; outside that period, another payment may be needed. Approval is not guaranteed and the extra screening can slow you down, so treat it as a last resort and check TSA's site for the current rules.
Places US Citizens Can Go Without a Passport
Puerto Rico
Puerto Rico is a US territory, so travel there counts as domestic. You need the same ID you would use for any domestic flight, such as a REAL ID driver's license. Agricultural inspection requirements can still apply when returning to the mainland.
US Virgin Islands (St. Thomas, St. John, St. Croix)
You can visit with a valid government-issued ID, but the USVI sits outside the US customs territory, so you go through a CBP inspection when you return to the mainland. Bring your birth certificate or a passport card so you can prove citizenship quickly.
Guam and the Northern Mariana Islands
These Pacific territories treat US citizens as domestic travelers, so a passport book may not be needed on a domestic route through Honolulu; confirm airline and territorial citizenship-document requirements. Routes that connect through Tokyo, Seoul or another foreign airport require a passport, because you pass through a foreign country.
American Samoa
American Samoa has separate entry requirements. The Department of the Interior lists a valid U.S. passport or certified birth certificate proving U.S. nationality, plus an onward ticket or proof of local employment. Check the current territorial entry process and airline rules before booking; carry photo ID if relying on a birth certificate.
Closed-Loop Cruises
An eligible closed-loop cruise starts and ends at the same US port and travels within the Western Hemisphere. U.S. re-entry exceptions do not waive foreign-port or cruise-line requirements. US citizens can board with a government-issued photo ID and an original or certified copy of their birth certificate, or with a passport card. Typical stops include the Bahamas, Bermuda, Mexico, Belize, Jamaica, Costa Rica and Canada.
Keep in mind:
- A REAL ID alone is not enough. It proves identity but not citizenship.
- If a destination or the cruise line requires a passport for your itinerary, the U.S. closed-loop exception does not override that requirement.
- Cruise lines usually recommend that you bring a passport anyway. If you miss the ship or need to fly home from a foreign port after an emergency, you will need one.
Crossing the Border by Land or Sea (Canada and Mexico)
Under the Western Hemisphere Travel Initiative (WHTI), US citizens entering the US by land or sea from Canada, Mexico, Bermuda or the Caribbean can use any of these:
- Passport book
- Passport card (valid for land and sea only, never air)
- Enhanced driver's license (issued by only a few states)
- Trusted traveler card such as NEXUS, SENTRI or FAST
- Children under 16 can present a birth certificate
WHTI governs your return to the US. Canada and Mexico set their own entry rules, so check what each country accepts before you go. Ordinary flights require a passport book; the limited U.S.–Canada NEXUS exception must be checked separately.
Document Cheat Sheet
| Document | Domestic flight | Closed-loop cruise | Land/sea border | International flight |
|---|---|---|---|---|
| Passport book | Yes | Yes | Yes | Yes |
| Passport card | Yes | Yes | Yes | No |
| REAL ID | Yes | Only with birth certificate | No | No |
| Enhanced driver's license | Yes | Check cruise-line and destination rules | Yes under applicable WHTI rules | No |
| Birth certificate | No | Only with photo ID | Only for children under 16 | No |
Where You Cannot Go Without a Passport
- Ordinary international flights, including to Mexico, the Bahamas, Bermuda and the Dominican Republic; U.S.–Canada NEXUS air exceptions are narrowly defined
- A cruise that starts and ends in different ports, or that visits a country outside the Western Hemisphere
- Flights to Guam or other territories that connect through a foreign airport
- Any trip where you will need to fly home from abroad, even if you left by car or ship
Common Mistakes
- Assuming a REAL ID is a substitute for proof of citizenship
- Bringing a photocopy of a birth certificate when the cruise line wants the original or a certified copy
- Booking a Guam flight with a layover in Asia
- Skipping a passport entirely when a missed ship would leave you unable to fly home
- Assuming a passport card works at airports
FAQ
Can I travel without a passport to Mexico?
Not by air. You need a passport book to fly to Mexico. For land and cruise travel, check Mexico’s entry rules separately from U.S. return rules; do not assume a regular license and birth certificate suffice for an adult crossing.
Can I go to Canada without a passport?
For ordinary flights, bring a passport book; limited NEXUS air exceptions have specific conditions. For land or sea trips, suitable alternatives may apply. Check the Canadian government's current rules for your trip before leaving.
Is a passport card enough?
For land and sea travel to Canada, Mexico, the Caribbean and Bermuda, yes. It is not valid for international air travel.
Is a closed-loop cruise really passport-free?
An eligible U.S. citizen may meet the U.S. closed-loop exception, but destination and cruise-line requirements can still require a passport book.
Do children need a passport for these trips?
U.S. citizen children under 16 returning from Canada or Mexico by land or sea may use the applicable birth-certificate exception. Cruise-line and foreign entry rules are separate. Ordinary international flights require each child’s own passport book.
What is the cheapest way to get a travel document?
A passport card costs less than a passport book and works for land and sea trips, including closed-loop cruises. If you may ever fly abroad, the passport book is the safer choice.
Bottom Line
You can travel without a passport inside the US, to its territories, and on closed-loop cruises, but the documents differ for each. Carry a REAL ID and a birth certificate, check each port's rules, and remember that a passport book is the only document that works for every international flight. If a spontaneous trip is coming up, a passport or passport card gives you the most options.
Get Your Passport or Passport Card Photo Right with PhotoOmni
Ready to skip the guesswork on your next trip? A US passport and passport card both require a compliant 2 × 2 inch photo, and photo problems can cause delays. PhotoOmni formats your phone photo to the official specification, checks it against the requirements, and has a human review team look for issues like shadows, expression and background before you submit.
Official Sources
Checked October 12, 2026.
- TSA accepted identification and children
- TSA ConfirmID: $45 for a 10-day period
- CBP closed-loop cruise documents
- CBP U.S. citizen return documents
- American Samoa entry requirements
Related Articles
- Passport Book vs Passport Card: Which One Do You Actually Need?
- Do You Need a Passport to Go to Canada? ID Rules for U.S. Travelers by Air, Car and Boat (2026)
- Can You Get a REAL ID Online? Where to Apply, Documents, and Photo Rules (2026)
About the Author
PhotoOmni Editorial Team
The PhotoOmni Editorial Team researches official passport, visa and identity-photo requirements. Government sources were checked on October 12, 2026; rules and charges can change.