The Core Documents You Need

To board a domestic flight in the United States, you need a government-issued photo ID. A driver's license, passport, or state ID card all work. The TSA (Transportation Security Administration) checks that your name matches your airline ticket and that the ID is not expired. If your ID expired, it will not work — you cannot board.

For international flights, you need a valid passport. Some countries also require a visa, which is a separate document your passport does not include. Check the entry requirements for your destination country at least two weeks before your trip, because getting a visa takes time. Your passport must be valid for at least six months after your travel date in most cases.

Your airline ticket — whether printed, on your phone, or in your email — is also required. You will show it at check-in and again at the gate. If you booked through an airline website, you can usually pull up your confirmation number on your phone and the airline will look up your reservation.

Key Takeaways

  • A government-issued photo ID (driver's license, passport, or state ID) is required for all domestic flights and must not be expired.
  • International flights require a valid passport, and many destinations also require a visa that you must obtain before your trip.
  • Your airline ticket or confirmation number must match the name on your ID exactly — middle names and initials must be consistent.
  • Arrive at the airport at least two hours before a domestic flight and three hours before an international flight to allow time for check-in and security screening.
  • Certain items are prohibited in carry-on bags (liquids over 3.4 ounces, sharp objects, lighters) but may be allowed in checked luggage depending on the item.

What Happens If Your Name Does Not Match

Your ID name must match your ticket name exactly. If your ticket says "Robert James Smith" but your ID says "Robert J. Smith," you may be stopped at check-in. The airline can sometimes correct small discrepancies on the spot, but it is not may provide. If you recently changed your name through marriage or legal process, update your ID before you travel, or bring the legal document that shows the name change (marriage certificate, court order) along with both your old and new ID.

If you notice a mismatch before your flight, call the airline when ready — do not wait until you arrive at the airport. Some airlines can fix it over the phone; others require you to visit the ticket counter in person before your flight date.

Items You Cannot Bring Through Security

The TSA prohibits certain items in carry-on bags. Liquids, gels, and aerosols (including shampoo, toothpaste, peanut butter, and sunscreen) must be 3.4 ounces or smaller per container, and all containers must fit in a single quart-sized clear plastic bag. You can bring one bag per person. Larger containers must go in your checked luggage.

Sharp objects like knives, box cutters, and ice picks are not allowed in carry-on bags but can go in checked luggage if they are sheathed or wrapped. Lighters and flammable items are prohibited in both carry-on and checked bags. Firearms, ammunition, and explosives have strict rules — contact your airline before packing any of these.

Electronics like laptops, tablets, and large power banks must come out of your bag at security screening. Batteries are allowed in carry-on bags but not in checked luggage unless they are in or attached to a device. If you are unsure whether an item is allowed, check the TSA website or call the airline before you pack.

What to Bring for Smooth Airport Screening

Arrive early enough to check in, drop off luggage, and get through security without rushing. For domestic flights, plan to arrive two hours before departure. For international flights, arrive three hours before departure. This timing assumes normal airport traffic and no unusual delays.

At security, have your ID and boarding pass ready before you reach the checkpoint. Remove your shoes, belt, and jacket, and place them in a bin along with your laptop and liquids bag. Keep your phone and keys in your pocket or bag until after you pass through the metal detector. Wear clothing that does not have excessive metal (large buckles, rivets, or underwire) to avoid triggering the detector and needing additional screening.

If you are traveling with children, bring their ID or birth certificate. If a child does not have an ID, the TSA can verify their age and identity through the adult traveling with them, but the process takes longer.

Special Circumstances and Additional Documents

If you are traveling with a service animal, bring documentation from a licensed healthcare provider stating that the animal is trained to perform a task or job for you. Emotional support animals have different rules and may not be allowed in the cabin on all airlines — check with your airline before booking.

If you are traveling with medication, keep it in its original labeled container and bring a copy of your prescription or a letter from your doctor. Syringes and inhalers are allowed through security. Liquid medications over 3.4 ounces can go through security if you declare them separately.

If you are a non-U.S. citizen, your passport is your primary ID. A visa or travel permit (like an ESTA for certain countries) may also be required. Check the U.S. State Department website for entry requirements based on your citizenship.

What Happens After You Board

Once you pass through security and reach your gate, you will board when the airline calls your boarding group. Have your boarding pass ready — either printed or on your phone. The flight attendants will scan it as you enter the plane. After takeoff, you can use approved electronic devices in airplane mode, but larger electronics like laptops must stay stowed during flight unless the airline has a specific policy allowing them.

Bring any medications, valuables, or items you need during the flight in your carry-on bag. Checked luggage is not accessible during flight. If you are connecting to another flight, your checked bag will be transferred automatically if you booked through the same airline, but you will need to collect it and recheck it if you booked separate tickets.

Frequently Asked Questions

Can I use an expired ID to fly domestically?

No. The TSA requires a valid, non-expired government-issued photo ID for all domestic flights. An expired ID will not work even if it is only expired by a few days. If your ID is expired, renew it before your flight or bring an alternative form of ID like a passport.

What if I lost my ID right before my flight?

Contact the TSA at the airport before you travel. You can go through a secondary screening process where TSA officers ask you questions to verify your identity. This takes extra time, so arrive even earlier than usual. Bring other documents that help prove who you are, such as a credit card, employee badge, or insurance card.

Do I need a passport for a flight to Hawaii or Puerto Rico?

No. Hawaii and Puerto Rico are U.S. territories, so a valid driver's license or state ID is sufficient for domestic flights. A passport is not required. However, if you are a non-U.S. citizen, check with your airline about what ID they accept.

Can I bring a full-size suitcase as a carry-on?

It depends on the airline. Most airlines allow one carry-on bag and one personal item (purse, backpack, laptop bag). Carry-on bags typically cannot exceed 22 x 14 x 9 inches. Check your airline's website for their specific size limits before you pack. If your bag is too large, you will have to check it at the gate, and you may be charged a fee.

What do I need if I am flying with a child who has no ID?

Children under 18 do not need an ID to fly domestically if they are traveling with an adult. The adult must have a valid ID. For international flights, children need a passport. If your child does not have a passport yet, explore at least six weeks before your trip.