Adult passengers 18 and older must show valid identification at the airport checkpoint in order to travel. Beginning May 7, 2025, if you plan to use your state-issued ID or license to fly within the U.S., make sure it is REAL ID compliant.
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In the United States, you need a valid U.S. government-issued photo ID or a passport from your country of origin to travel through security. You must show that the name on your boarding pass matches the legal name on your unexpired government-issued ID.
Domestic Flights. All travelers flying on a domestic flight must present a valid (unexpired) photo ID issued by the state or federal government. Undocumented individuals may use the following forms of ID accepted by TSA: State photo identity card.
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.
A government-issued photo ID, such as a state-issued ID card, is sufficient for domestic air travel. In other words, using your passport as a government-issued photo ID is possible but not mandatory. Your state-issued driver's license, for instance, is sufficient to board your domestic flight.
Wear clothing and shoes without metal, and be ready to remove your belt if it has a metal buckle. Tuck large metal jewelry pieces into your carry-on bag before you go through the security checkpoint. Put change and keys into your carry-on or empty your pockets into a plastic bin when you arrive at the checkpoint.
In the event you arrive at the airport without proper ID, because it is lost or at home, you may still be allowed to fly. By providing additional information, TSA has other ways to confirm your identity, like using publicly available databases, so you can reach your flight.
Depending on the requirements of airport authorities, you will need to present a mobile boarding pass, a paper boarding pass printed out by you or a paper boarding pass picked up from the check-in desk.
In short, the 3-1-1 rule is: Each liquid you bring through the TSA checkpoint must be in a 3.4-ounce or smaller container (3), all containers must be placed inside one clear quart-size plastic bag (1) and each passenger is only allowed one plastic bag (1).
If you fly domestically within the US or Europe you seldom need to print your boarding pass: if you check-in from your phone (typically through a smartphone app), the default option will be to just download a “mobile boarding pass”.
Firearms, ammunition, and fireworks are prohibited, as are all knives and safety razors (including pocket knives and Swiss Army knives). Straight razors and replacement blades for straight razors are also not allowed. Most tools also cannot be packed in carry-on luggage, as they have the potential to cause harm.
Is toothpaste considered a liquid by the TSA? Yes, toothpaste must adhere to the 3-1-1 rule for liquids and gels. Toothpaste can be brought through TSA security in your carry-on as long as it is 3.4 ounces (100 milliliters) or less and placed in a 1-quart bag.
Each passenger is limited to one quart-size bag of liquids, gels and aerosols. Common travel items that must comply with the 3-1-1 liquids rule include toothpaste, shampoo, conditioner, mouthwash and lotion.
What to Do After Online Check-In. Once you receive your electronic boarding pass, you can head straight to security if you're traveling carry-on only. If you're checking a bag, you'll still need to stop by the ticketing area at the airport. Look for special “bag drop” lines that bypass longer check-in lines.