Your travel mode also affects your passport requirements. Road and sea travel to passport-free territories often don't require passports. But air travel to international destinations will always require a valid passport.
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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.
U.S. nationals, including U.S. dual nationals, must use a U.S. passport to enter and leave the United States. U.S. dual nationals may also be required by the country of their foreign nationality to use that country's passport to enter and leave that country.
If your passport's time is almost up, don't wait — start the renewal process now. You can't travel while your renewal application is being processed, and you need to make sure your travel documents are valid for at least six months past the dates of any planned international trips.
In most countries, you can travel anywhere within your nation's borders without a passport. The only exception is when you leave your home country to enter a foreign nation. However, even if you travel nationally, you will always need photo ID, such as a driver's license or National ID card to board a flight.
While it is important to be alert, it is also important not to openly display your passport (even if standing in the immigration line). Always conceal your passport to the best of your ability and make sure that it is secure in a zipped bag that is always with you.
Mobile Passport Control (MPC) allows eligible travelers to submit their travel document, photo, and customs declaration information through a free, secure app on their smartphone or other mobile device.
As per the Western Hemisphere Travel Initiative (WHTI), Canadian citizens aged 16 years and older must present one of the following documents when entering the United States by land or water: a valid passport. a Trusted Traveler Program card.