Can a citizen travel without a passport?

Air Travel: U.S. citizens (including infants and children) departing from or entering the United States by air are required to present a valid U.S. passport to board an international flight. U.S. citizens departing from a designated Canadian airport can use their NEXUS Card for entry when utilizing a NEXUS kiosk.



Yes, a citizen can travel without a passport in several specific scenarios, depending on their destination and the mode of transport. For domestic travel within their own country (e.g., New York to Los Angeles or London to Edinburgh), a government-issued photo ID like a driver's license is sufficient. In 2026, many countries are also using digital IDs or biometric facial recognition at security checkpoints, eliminating the need for physical documents entirely. For international travel, citizens of the Schengen Area in Europe can move between 29 countries using only their National ID card. U.S. citizens can travel to U.S. territories (like Puerto Rico, Guam, or the U.S. Virgin Islands) without a passport. Additionally, for "closed-loop" cruises starting and ending at the same U.S. port, a birth certificate and government ID are often acceptable under the Western Hemisphere Travel Initiative (WHTI). However, for almost all other trans-border air travel, a valid passport remains the only globally recognized document for entry and exit.

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Air Travel: U.S. citizens (including infants and children) departing from or entering the United States by air are required to present a valid U.S. passport to board an international flight. U.S. citizens departing from a designated Canadian airport can use their NEXUS Card for entry when utilizing a NEXUS kiosk.

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U.S. Passport. Trusted Traveler Program card (NEXUS, SENTRI or FAST) (see below) U.S. Military identification card when traveling on official orders, or. U.S. Merchant Mariner document when traveling in conjunction with official maritime business.

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For U.S. citizens, a passport or visa is not required. Instead, a birth certificate and one photo identification card may be used; however, a photo identification card by itself is not enough. For permanent residents of the United States, “Green Cards” may be used in lieu of their passports.

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U.S. citizens must present a valid U.S. passport book or card, in addition to an entry permit (Forma Migratoria Multiple or FMM) issued by Instituto Nacional de Migración (INM). Travelers should be sure to enter Mexico with valid proof of automobile registration, even if remaining in the border zone.

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The most likely scenario is that you will be prevented from boarding transport by the staff on duty. If you managed to avoid that situation, you could be blocked from entering your destination by border authorities upon arrival. Generally, it is necessary to have a valid passport if you want to travel abroad.

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With two exceptions, U.S. citizens were not required to have a passport for travel abroad until 1941. Passports were required for a short time during the Civil War (August 19, 1861–March 17, 1862) and during World War I (May 22, 1918–1921). After World War II began, passports became mandatory for all U.S. travelers.

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Outright denial is oftentimes expected for reasons such as a criminal record or incorrect documentation. If a border officer in the USA decides to deny your entry, a second officer usually steps in to validate. If the second officer also denies your entry, the decision has been made. You cannot enter the US.

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Beginning May 3, 2023, your driver's license will need to be REAL ID-compliant if you want to use it to fly within the U.S. It's part of a law passed by Congress. If your license is not compliant, and you don't have another acceptable form of ID, you'll have trouble getting through airport security.

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Requirements for a USA trip
  1. You have a valid passport or Green Card.
  2. You have a valid ESTA or US visa that matches your passport data (not applicable to Green Card holders).
  3. You do not pose a threat to the USA or the American people.
  4. You are not subject to an entry ban.


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At a Glance: Yes, you need a passport to go to Cancun, Mexico from the United States. When traveling by air, a valid passport is required, along with a completed Multiple Migratory Form (FMM).

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