Flying is a common way to travel between US cities. Domestic flights have no passport control, but you must show ID at the TSA security checkpoint (TSA is the Transportation Security Administration).
Since May 7, 2025, adults (18 and older) need one of these at the checkpoint:
A REAL ID driver's license or state ID (with a star in the top corner)
Your foreign passport (from your country's government)
A green card (Permanent Resident Card)
An Employment Authorization Card (EAD, Form I-766)
A US passport or passport card, or a trusted traveler card like Global Entry
A license without the star is not accepted for flying. For most newcomers, the simplest choice is to carry your passport. TSA accepts listed IDs up to two years after they expire.
Since February 1, 2026, an adult without an accepted ID can pay a $45 fee for TSA ConfirmID, paid online at pay.gov before the airport. TSA then tries to confirm who you are, but it is not guaranteed, and it can take extra time.
Children under 18 do not need ID from TSA on domestic flights, but check with the airline.
In your carry-on bag, liquids, gels, creams and sprays must be in containers of 3.4 ounces (100 ml) or less, all inside one quart-size clear bag, one bag per person. Larger containers go in your checked bag. Medicines and baby food or milk are allowed in larger amounts; tell the officer.
Spare lithium batteries and power banks go in your carry-on, not in checked bags.
Sharp objects, most tools and large amounts of liquid are not allowed in carry-on bags. TSA's website and app have a What can I bring? search.
Bags may be opened; this is normal.
Check in online or in the airline app 24 hours before. Get your boarding pass on your phone.
Look at your bag allowance. Many US fares charge for checked bags, and the cheapest fares may not include a full-size carry-on.
Arrive early. Airlines often suggest about 2 hours before a domestic flight; big airports and holidays need more.
Drop checked bags at the airline counter.
At security, show your ID and boarding pass. Put bags and laptops on the belt as the officer says.
Find your gate on the screens. Gates can change, so check again.
Boarding starts 30 to 45 minutes before departure, in groups printed on your boarding pass.
Bringing only a non-REAL ID license.
Name mismatch: the name on the ticket must match your ID.
Packing a water bottle full. Empty it before security and refill after.