
When packing for a flight, it's important to be aware of what you can and can't include in your luggage. While most everyday items are allowed, there are restrictions on certain items that you should be aware of. These restrictions vary depending on whether your luggage will be checked or carried on, and different countries and airlines may have specific rules.
| Characteristics | Values |
|---|---|
| Electronic devices | Devices with lithium batteries are prohibited in checked bags. Devices must be powered on to be permitted onboard. |
| Liquids | Liquids must be in containers no larger than 100ml (3.4oz) each and placed in a transparent, resealable plastic bag. |
| Beverages | Alcoholic beverages are allowed in limited quantities (up to 5 liters per passenger with 24-70% alcohol by volume). |
| Aerosols | Allowed only for medicinal or toiletry use (e.g., insect repellent, hairspray) and must be securely capped. |
| Power generators | Only new and unused power generators in original packaging are permitted as checked items. |
| Firearms | Allowed only in checked bags and must be declared to an agent at check-in. Small arms ammunition for sporting purposes is permitted up to 5kg. |
| Hazardous materials | Compressed or flammable gases (e.g., oxygen tanks, butane), strong acids, paint strippers, and drain cleaners are prohibited. |
| Realistic replicas | Realistic replicas of weapons (e.g., bombs, grenades) are not allowed in checked or carry-on bags. |
| Self-defense sprays | Sprays containing more than 2% tear gas by mass are prohibited. |
| Cremated remains | May be allowed in checked luggage but are prohibited by some airlines; consider carrying them in carry-on luggage. |
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What You'll Learn
- Flammable gases, e.g. butane, propane, and SCUBAs tanks
- Hazardous chemicals, e.g. strong acids, paint stripper, and hair dye
- Replica weapons, e.g. realistic replicas of bombs, grenades, and firearms
- Bear spray and self-defence sprays containing over 2% tear gas
- Electronic devices with lithium-ion batteries, e.g. e-cigarettes and power banks

Flammable gases, e.g. butane, propane, and SCUBAs tanks
Flammable gases like butane, propane, and SCUBA tanks are prohibited in checked luggage. This is because they are highly flammable and can pose a safety risk. Flammable gases are also classified as hazardous materials, or "hazmat", which are prohibited from being transported by air. This is in line with TSA guidelines, which prohibit hazardous materials such as flammable liquids, poisons, and toxic substances.
Oxygen tanks are also prohibited for similar reasons, and passengers requiring oxygen are advised to use a portable oxygen concentrator or request oxygen service from their airline.
Flammable gases can be extremely dangerous if exposed to high temperatures or a spark, and their combustion can cause explosions. Butane and propane, in particular, are commonly used in cooking and heating appliances, and their canisters can be mistaken for harmless canisters by unsuspecting passengers.
It is important to note that even if an item is generally permitted, it may be subject to additional screening or prohibited from passing through security if it triggers an alarm, appears tampered with, or raises security concerns. The final decision rests with the TSA officer at the checkpoint. Passengers are advised to plan ahead and pack properly to facilitate the screening process and ensure a smooth travel experience.
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Hazardous chemicals, e.g. strong acids, paint stripper, and hair dye
When packing for a flight, it's important to remember that hazardous items are prohibited in both carry-on and checked luggage. Hazardous chemicals, such as strong acids, paint stripper, and hair dye, are considered dangerous and restricted from air travel. These items are classified as hazardous materials (Hazmat) and must be handled with care to ensure the safety of all passengers and crew.
Strong acids are highly corrosive and can cause severe damage to skin, eyes, and other materials in close proximity. As such, they are strictly prohibited in checked luggage. Paint stripper, also known as paint thinner, contains harmful chemicals such as methylene chloride, toluene, and acetone, which pose serious health risks. Ingesting or inhaling paint stripper can lead to dizziness, headaches, and even organ damage. Therefore, it is considered a hazardous chemical and is not allowed in checked baggage.
Hair dye products often contain chemicals like ammonia, peroxide, and PPD (paraphenylenediamine), which can cause allergic reactions and skin irritation. While hair dye may seem like a harmless personal care item, its chemical composition can pose risks when transported in large quantities. To ensure the safety of passengers and comply with regulations, hair dye is typically prohibited in checked luggage.
Additionally, other hazardous materials, such as flammable liquids, poisonous or toxic substances, and radioactive materials, are also banned from checked luggage. It is crucial to adhere to these regulations to maintain safety and avoid legal consequences. Failure to declare dangerous items can result in significant fines and imprisonment, as outlined by U.S. federal law.
If you need to travel with any of these items, it is essential to contact your airline directly and inquire about their specific policies. Some airlines may provide alternative options or special handling procedures for transporting hazardous materials. Being informed and aware of the restrictions will help ensure a smooth travel experience and maintain the safety of everyone on board.
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Replica weapons, e.g. realistic replicas of bombs, grenades, and firearms
Replica weapons, including realistic replicas of bombs, grenades, and firearms, are not permitted in checked luggage or in the cabin. Even if the item is clearly a toy, security staff may confiscate it as they do not want to argue borderline cases. If a more realistic-looking toy weapon is allowed through, it may set a precedent for other passengers with similar items, which could potentially be dangerous.
Realistic replicas of weapons can cause panic on a plane, just as they would if brandished in the street. People are not expected to know that these items are fake, and the potential security risk is too great. Even if you do not have any malicious intent, security staff will likely question why you are travelling with such an item.
If you are unsure about an item, it is best to check with the airline or airport security beforehand. Items that are generally permitted may still be subject to additional screening or prohibited from passing through security if they trigger alarms, appear tampered with, or pose security concerns. The final decision rests with the TSA officer at the checkpoint.
It is important to plan ahead and pack properly to ensure a smooth travel experience. Replica weapons should be left at home to avoid any potential issues or delays during security screening.
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Bear spray and self-defence sprays containing over 2% tear gas
When packing for a flight, it's important to consider what items may be prohibited or restricted. Bear spray and self-defence sprays are subject to specific rules and limitations. Here's what you need to know about bringing these items in your checked luggage:
Quantity Limitations: Only a small amount of self-defence spray is permitted in checked luggage. Specifically, you are allowed to carry one self-defence spray not exceeding 118 ml (4 fluid ounces) per passenger. This quantity restriction is inclusive of other medicinal and toiletry articles. The total aggregate quantity of all such items per person cannot exceed 2 kg (70 ounces) or 2 litres (68 fluid ounces). Additionally, the capacity of each individual container must not exceed 0.5 kg (18 ounces) or 500 ml (17 fluid ounces). These limitations ensure that passengers can carry essential items while maintaining safety and security on board the aircraft.
Prohibited Ingredients: It is important to note that not all self-defence sprays are permitted. Any self-defence sprays containing more than 2% by mass of tear gas (specifically, CS or CN) are strictly prohibited in checked baggage. This restriction is in place due to the hazardous nature of tear gas and the potential safety risks it poses in an enclosed aircraft environment.
Safety Mechanisms: Allowed self-defence sprays must have safety mechanisms in place to prevent accidental discharge. This could include a recessed button, a flip-up cap, or other innovative devices. These safety features ensure that the spray is not accidentally activated during transportation, reducing the risk of exposure to the substance.
Bear Spray: Most bear sprays exceed the permitted size of 4 ounces and, therefore, cannot be carried in checked luggage. However, it is always best to check with the specific airline and airport authorities, as the final decision rests with the TSA officer on duty. They will determine whether an item is allowed through the security checkpoint.
When in doubt, it is advisable to contact the airline and airport authorities beforehand to clarify any concerns about prohibited items. Additionally, packing properly and planning ahead can significantly facilitate the screening process and enhance your overall travel experience.
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Electronic devices with lithium-ion batteries, e.g. e-cigarettes and power banks
Many electronic devices rely on lithium-ion batteries to function. These batteries are, however, highly flammable if damaged or if their terminals are short-circuited. For this reason, they are subject to strict regulations when it comes to air travel.
Electronic devices with lithium-ion batteries, such as e-cigarettes, smartphones, tablets, laptops, cameras, power banks, and generators, are prohibited from checked luggage. These items can be carried in carry-on baggage but must be completely powered off and protected from damage and accidental activation. Some airlines may require that you remove the batteries from your devices and place them in separate plastic bags.
E-cigarettes, in particular, are not allowed in checked bags but can be carried in carry-on luggage. However, their use is prohibited onboard flights. It is recommended that e-cigarettes be transported in a designated carry case. Regulations for e-cigarettes vary by country, so it is important to check the relevant government websites for the specific rules of your destination and any countries you will be travelling through.
Similarly, power banks are not permitted in checked luggage or as carry-on items. Only small, personal power banks are allowed in carry-on baggage, and they must be individually protected and approved by the airline.
It is important to note that the final decision on whether an item is allowed rests with the TSA officer. If you are unsure about a specific item, it is best to leave it at home or contact the relevant authorities before your travel.
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Frequently asked questions
You can take a maximum of 5 litres of alcohol per passenger in checked luggage, as long as it is between 24% and 70% alcohol by volume. Customs regulations vary by country, so be sure to check the rules for your destination.
No, you cannot travel with electronic cigarettes in your checked luggage because they often contain lithium-ion batteries. You can, however, travel with them in your carry-on luggage, but you must not use them on board.
Lithium batteries are prohibited in checked luggage because they can catch fire. If a lithium battery is damaged, or the terminals are short-circuited, a fire can occur. Lithium batteries are often found in common electronic devices, so be sure to check what you are travelling with.
Aerosol sprays are only allowed if they are for medicinal or toiletry use, such as insect repellent or hairspray. Other aerosols, such as spray paint, air freshener or cooking spray, are not allowed.
Gas-powered generators are only accepted as checked items if they are new, unused, and in their original packaging.











































