
Knowing what you can and can't bring to the airport is essential for a smooth travel experience. The Transportation Security Administration (TSA) and Federal Aviation Administration (FAA) restrict many common items to prevent inflight danger. These include firearms, fireworks, flammable substances, and spillable batteries. Liquids, gels, and aerosols are subject to the 3-1-1 rule, allowing containers of 3.4 ounces or less in a quart-size bag. Medications, baby formula, and breast milk are exempt but must be declared. Planning and proper packing are key, and travellers should be aware of specific airline and country regulations, such as those for lithium batteries and agricultural products. Signing up for TSA PreCheck can expedite the security process, but ultimately, TSA officers have the final say on permitted items.
| Characteristics | Values |
|---|---|
| Firearms | Allowed only in checked bags if declared at check-in; gunpowder and gunpowder pellets are prohibited |
| Alcoholic beverages | Allowed in checked bags with a maximum of 5 liters per passenger for beverages 24%–70% alcohol by volume; beverages over 70% alcohol by volume are prohibited |
| Lithium-ion batteries | Allowed in carry-on bags with airline approval, with a maximum of 2 batteries not exceeding 160 Wh each; must be removed from devices in checked bags and placed in carry-on bags |
| Medications, baby formula, and breast milk | Exempt from the liquid rule but must be declared at security |
| Flammable substances and bear spray | Prohibited in both carry-on and checked luggage |
| Fireworks, flares, hand grenades, blasting caps, dynamite, and replicas of explosive materials | Prohibited onboard aircrafts |
| Chlorine, bleach, spillable batteries, spray paint, fertilizers, tear gas, and fire extinguishers | Prohibited on commercial passenger aircrafts |
| Perishable food items | Prohibited or restricted depending on the country or region, e.g., meat, milk, fruits, and vegetables |
| Dry ice containers | Allowed as checked baggage with specific requirements, including early arrival at the airport and signing a declaration form |
| Electronic devices | Allowed in carry-on bags; powerless devices will not be permitted onboard |
| Tools | Small tools like screwdrivers, wrenches, and pliers (7 inches or less in length) are permitted in carry-on bags; larger tools should be securely wrapped and packed in checked baggage |
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What You'll Learn
- Liquids, gels, and aerosols are allowed in carry-on luggage but must be under 3.4 oz
- Firearms are allowed in checked bags only if declared at check-in
- E-cigarettes and vaporizers can be carried on board but not in checked bags
- Medication, baby formula, and breast milk are exempt from the liquid rule but must be declared
- Lithium-ion batteries are allowed in carry-on bags with airline approval, but not in checked bags

Liquids, gels, and aerosols are allowed in carry-on luggage but must be under 3.4 oz
Liquids, gels, and aerosols are permitted in carry-on luggage, but there are strict rules to follow. Firstly, each container must be 3.4 ounces (100ml) or less in volume. This includes all typical liquid items such as beverages, contact lens solution, shampoo, makeup products, liquid medicine, nail polish, perfume, and face toner. It also includes gels like hair gel, toothpaste, hand sanitizer, and face serum, and aerosol products like hairspray, dry shampoo, and spray-on deodorant. These items must be placed in a clear, quart-size, zip-top bag for screening. This is known as the 3-1-1 rule. Food items like peanut butter and soft cheese, such as brie, are also subject to this rule, as are alcoholic beverages with less than 70% alcohol content. Medications, baby formula, and breast milk are exempt from the 3-1-1 rule but must be declared at security.
Some items are prohibited in both carry-on and checked luggage, including flammable substances and bear spray. Other prohibited items include fireworks, hand grenades, dynamite, and replicas of explosive materials. Chlorine, bleach, spillable batteries, spray paint, fertilizers, and fire extinguishers are also considered dangerous and are not allowed on commercial flights.
It is important to note that even if an item is generally permitted, it may be subject to additional screening or confiscation if it triggers an alarm, appears tampered with, or poses security concerns. The final decision rests with the TSA officer at the checkpoint.
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Firearms are allowed in checked bags only if declared at check-in
Firearms are highly regulated at airports, and there are strict rules about their transportation. If you are planning to travel with a firearm, it is important to be aware of the relevant procedures and restrictions. Firstly, firearms are only permitted in checked bags and must be declared at check-in. This means that firearms are not allowed in carry-on luggage or onboard the aircraft. Passengers must be over 18 years old to carry a firearm in checked baggage. It is also advised that passengers travelling with firearms arrive at the airport at least 30 minutes earlier than the standard recommended check-in time.
When packing a firearm, it is crucial to follow specific guidelines. Firstly, the firearm and ammunition must be packed separately and never in the same container. Only shells and cartridges are accepted as ammunition and must be carried in checked baggage. Gunpowder and gunpowder pellets are strictly prohibited. Ammunition must be packed securely in a strong container made of plastic, wood, metal, or fibreboard. It is also recommended to place the fibreboard carton inside a resealable plastic container for added safety.
In addition to the above, there are other important considerations when travelling with firearms. For instance, certain items related to firearms, such as power generators, are not permitted onboard the aircraft and must be checked. Lithium-ion batteries, often used in electronic devices, are also prohibited in checked bags. These batteries can be carried in carry-on luggage but must be removed from the devices and placed in separate plastic bags. It is important to note that lithium-ion batteries intended for personal transportation devices are not allowed on board or in checked bags.
Furthermore, travellers should be aware of local laws and regulations regarding firearms and ammunition. For example, when travelling to or from Japan, passengers are allowed to carry one lighter per person. However, in the European Union (EU), there are strict regulations on importing certain products, such as meat and milk, for personal consumption. It is always advisable to check with local authorities and airport operators to ensure compliance with applicable laws and restrictions.
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E-cigarettes and vaporizers can be carried on board but not in checked bags
When it comes to e-cigarettes and vaporizers, there are specific regulations in place for air travel. While you are permitted to carry these items on board, there are important restrictions to keep in mind.
Firstly, e-cigarettes and vaporizers are only allowed in carry-on luggage or on your person. The Federal Aviation Administration (FAA) prohibits these devices from being transported in checked bags. This includes battery-powered e-cigarettes, vape pens, atomizers, and electronic nicotine delivery systems. It's important to remember that even if an item is generally permitted, it may be subject to additional screening or confiscation if it triggers security concerns or appears tampered with.
Additionally, batteries are a crucial consideration when packing e-cigarettes and vaporizers. If your device contains lithium-ion batteries, you must carry it in your hand luggage. Batteries should be removed from checked bags and placed in carry-on luggage, following the airline's guidelines. Some airlines may require you to place batteries in separate plastic bags within your carry-on. It's important to check the specific guidelines of your airline and the local airport regulations, as these may vary.
To ensure a smooth travel experience, it's advisable to familiarize yourself with the rules and restrictions for the specific airport and airline you're dealing with. Each airline may have unique policies regarding the transportation of e-cigarettes and vaporizers, so checking their guidelines beforehand can prevent any issues during security screening.
Furthermore, it's worth noting that while e-cigarettes and vaporizers are allowed in carry-on luggage, their use onboard the aircraft is prohibited. This means you cannot use these devices during your flight. By following these guidelines and staying informed about any updates or changes in regulations, you can confidently navigate airport security and have a pleasant travel experience.
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Medication, baby formula, and breast milk are exempt from the liquid rule but must be declared
Medication, baby formula, and breast milk are exempt from the standard liquid rules at the airport. However, it is important to declare these items to the TSA officer at the beginning of the screening process. This is because they may need to be screened separately from your other belongings.
Formula, breast milk, and baby food are considered medically necessary liquids. As such, they are allowed in quantities greater than 3.4 ounces (100ml) in carry-on baggage and do not need to fit within a quart-sized bag. This also applies to cooling accessories, such as ice packs, freezer packs, and gel packs, which are permitted regardless of whether they contain breast milk or formula.
It is recommended that formula and breast milk are transported in clear, translucent bottles, as opposed to plastic bags or pouches. This is because liquids in plastic bags or pouches may not be able to be screened by Bottle Liquid Scanners, and you may be asked to open them for alternate screening. Screening will never include placing anything into the medically necessary liquid, and TSA X-ray machines are not harmful to food or medicines.
If you are not comfortable with your baby's formula, breast milk, or baby food being X-rayed or opened, you can decline, and additional screening steps will be taken to clear the liquid. This may include a pat-down and further screening of your other carry-on luggage.
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Lithium-ion batteries are allowed in carry-on bags with airline approval, but not in checked bags
Lithium-ion batteries are considered hazardous materials and are therefore subject to strict regulations when it comes to air travel. While you can pack them in your carry-on luggage, there are certain conditions that must be met. Firstly, you need to obtain approval from your airline before your flight. Additionally, the batteries must be installed in devices or packed separately in plastic bags. Each battery must not exceed a wattage of 160 Wh. It is important to note that spare batteries, power banks, and battery-powered personal transportation devices are prohibited in checked bags.
When packing lithium-ion batteries for air travel, it is crucial to follow the guidelines provided by the airline and regulatory authorities. These regulations are in place to ensure the safety of all passengers and crew members. Failure to comply with these guidelines may result in fines or other penalties.
It is worth noting that some airlines may have specific policies regarding lithium-ion batteries, so it is always a good idea to review their guidelines before your trip. By being informed and prepared, you can ensure a smoother travel experience and avoid any last-minute surprises at the airport.
Additionally, it is important to remember that any electronic devices containing lithium-ion batteries must be powered on at the request of a TSA officer. Devices that cannot be powered on will not be permitted onboard the aircraft. This is a security measure to ensure that the devices are functional and do not pose a safety risk.
Furthermore, passengers should be aware that other hazardous items, such as firearms, ammunition, and flammable substances, are subject to strict regulations and may be prohibited or restricted in both carry-on and checked luggage. It is always best to check with the airline and regulatory authorities before travelling with any potentially hazardous materials.
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Frequently asked questions
The 3-1-1 rule states that nearly all liquids, gels, and aerosols are allowed in carry-on luggage as long as they are in 3.4-ounce or smaller containers and fit together in a quart-size clear zip-top plastic bag.
Items such as fireworks, flares, hand grenades, blasting caps, dynamite, replicas of explosive materials, chlorine, bleach, spillable batteries, spray paint, fertilizers, tear gas, and fire extinguishers are considered dangerous and are not permitted on commercial passenger aircraft.
Firearms are only permitted in checked bags if they are declared to an agent at check-in. Only passengers 18 and over may carry a firearm in checked baggage.
Lithium-ion battery-powered personal transportation devices, generators, and lithium-ion batteries are not permitted in checked bags.
Flammable substances and bear spray are prohibited in carry-on bags.

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