A useful TSA travel guide starts with one simple rule: check an item before packing it, then make anything that may need inspection easy to reach. For flights departing from U.S. airports, the Transportation Security Administration (TSA) screens passengers and carry-on bags, but screening procedures can vary by airport, equipment and item. Before you pack, use TSA’s What Can I Bring? tool to check specific belongings. Then separate liquids, medication, electronics and spare batteries so you can follow checkpoint instructions without unpacking your entire bag.
TSA guidance is a starting point, not a guarantee that every item will pass without additional screening. Officers can inspect a bag or ask you to remove an item, and airlines may set separate limits for baggage size, weight or certain equipment. If you’re flying internationally, the airport authority in another country may apply different screening rules on your return journey.
Look up anything that could be difficult to replace or carry in checked baggage: medical equipment, unusual sports gear, tools, large toiletries, powders, batteries and items that resemble weapons. Search by the item’s name in TSA’s tool rather than relying on a general packing list. If the item is allowed only under certain conditions, note those conditions before you close your bag.
Deciding where to pack an item can prevent problems at both the checkpoint and the aircraft. The table below is a planning guide, not a substitute for checking the exact item. Some belongings have conditions or exceptions, and an airline may impose additional restrictions.
| Item | Carry-on approach | Checked-bag consideration |
|---|---|---|
| Toiletries and other liquids | Use containers of 3.4 ounces (100 milliliters) or less, packed together in one quart-sized bag. | Larger containers may be more practical here if the item is permitted and sealed against leaks. |
| Medication and medical supplies | Keep them accessible. Tell the officer about liquid medication or supplies that need separate screening. | Consider carrying essential medication with you rather than placing it in a bag you won’t have access to during the flight. |
| Laptop, tablet and similar electronics | Pack where you can reach them in case the checkpoint asks you to remove them. | Protect devices from impact and check airline guidance for battery-powered equipment. |
| Power banks and spare lithium batteries | Pack in your carry-on and protect the contacts from short circuits or damage. | Spare lithium batteries and power banks generally must not go in checked baggage. |
| Sharp items, tools and sports equipment | Check the exact item before packing; many sharp or bulky items are not permitted in the cabin. | Pack only if permitted, and secure the item so it cannot injure baggage handlers or damage belongings. |
| Firearms | Do not pack a firearm in carry-on baggage. | Follow TSA and airline requirements for unloaded firearms, locked hard-sided cases and declaration at check-in. |
For an item that isn’t clearly covered, don’t guess based on how it looks or how you carried it on a previous trip. Check the TSA entry and your airline’s baggage rules. If you still can’t confirm how it must be packed, contact the airline before traveling rather than arriving at the checkpoint with a last-minute decision to make.
For standard carry-on liquids, gels and aerosols, each container must hold no more than 3.4 ounces (100 milliliters). Put the containers in one quart-sized bag, with one such bag per passenger. The limit applies to the container’s capacity, not just the amount remaining inside it, so a partly empty larger bottle can still be a problem.
Think beyond shampoo and drinks. Creams, gels, pastes, sprays and some foods, such as sauces or spreads, can fall under the liquids rule. A solid snack is usually simpler to pack than a spreadable one, but check the specific food in TSA’s tool if its consistency makes the category unclear.
Place the liquids bag near the top of your carry-on or in an outside pocket. If the checkpoint asks you to take it out, you can do so without moving clothing, chargers and travel documents. Keep any larger toiletry containers in checked baggage only when they’re permitted and packed to prevent leaks.
Don’t pack essential medication in a place you can’t reach during travel. Keep it in its original packaging when practical, but don’t assume that original packaging alone settles whether an item can go through screening. For liquid medication, medically necessary liquids or medical equipment, check TSA’s item-specific instructions and be ready to tell the officer what you’re carrying.
Liquid medication and certain medical or accessibility-related items may be handled differently from ordinary toiletries. Declare them when instructed, and allow extra time if they need separate screening. If your equipment has batteries, cables, needles or other parts that could raise questions, check each component rather than treating the complete kit as one item.
Infant formula, breast milk and other child nourishment also have screening exceptions. Tell the TSA officer that you’re carrying them and follow instructions for inspection. Don’t rely on the standard liquids bag to cover these items; check the current TSA guidance for what applies to your supplies.
Food can be harder to screen when it is wrapped, packed tightly or mixed with other belongings. Keep food that may need inspection somewhere accessible, and remember that liquid or gel foods can be subject to the same carry-on limits as toiletries. If you’re carrying a gift, wait to wrap it until after screening when possible; an officer may need to inspect its contents, and wrapping can make that more difficult.
Pack laptops and other larger electronics so you can reach them if the checkpoint requires them to be removed. Screening lanes and equipment differ, so don’t automatically take everything out before you reach the belt. Follow the signs for your lane and the officer’s directions; some checkpoints may allow items to stay in the bag while others may not.
Keep chargers, cables and small accessories together rather than scattering them through several pockets. A dense tangle of objects can make a bag harder to inspect and harder for you to repack. Secure loose batteries and protect their terminals from contact with keys, coins or other metal items.
Wear clothing that you can adjust without holding up the line. Empty your pockets before placing items in a tray or bag, and put belts, bulky outerwear or other belongings where officers direct. Shoe-removal procedures can vary by checkpoint and screening circumstances, so follow the posted instructions rather than assuming the same process applies everywhere.
Keep identification, boarding details and medication separate from items you may need to place on the belt. That way, you can retrieve them quickly after screening without opening every compartment of your carry-on.
Good packing can reduce avoidable confusion, but it can’t guarantee a particular wait time or prevent additional screening. Build in the airport arrival time recommended by your airline or airport, especially if you have special equipment or an item that may need extra attention. For a connection, keep essentials in your personal item so you can reach them without unpacking your larger carry-on.
TSA PreCheck is a paid, application-based program for eligible travelers who want access to expedited screening lanes at participating airports. It may suit frequent flyers who value a more predictable screening routine, but it isn’t a substitute for following instructions or checking what you can bring. Access depends on enrollment, the trip and lane availability; it isn’t guaranteed for every passenger or every flight.
If you enroll, follow the program’s instructions for adding your Known Traveler Number to a reservation and check that the relevant indicator appears on your boarding pass. If it doesn’t, don’t assume you can use the expedited lane. Review the airport’s signs and follow the directions provided there.
TSA screens passengers at U.S. airport checkpoints, but equipment, lane setup and instructions can vary. Follow signs and directions at the checkpoint you’re using rather than relying on a routine from another airport.
The standard rule focuses on container size and how liquids are packed, not whether the label is original. Each standard carry-on container must hold no more than 3.4 ounces (100 milliliters), and the containers must fit in one quart-sized bag per passenger.
Medication can be screened, and liquid medication or medical supplies may be subject to procedures different from ordinary toiletries. Keep medication accessible, check TSA’s guidance for the specific item and tell the officer when instructed.
Only when the signs or TSA officer instruct you to do so. Screening equipment and procedures vary, so pack the laptop where it’s easy to reach without unpacking the rest of your carry-on.
Power banks and spare lithium batteries generally belong in carry-on baggage, not checked luggage. Check the airline’s requirements for battery-powered devices and pack batteries so their contacts are protected.
Search for the exact item in TSA’s What Can I Bring? tool and check your airline’s baggage policy if the item involves batteries, size limits or special handling. If the instructions remain unclear, contact the airline before packing it for the airport.
The most useful TSA travel guide is the one you apply before your bag is zipped: confirm uncertain items, separate liquids and essentials, and leave anything likely to need inspection within easy reach. At the checkpoint, follow the instructions for that lane and allow time for screening to take longer than expected.
