Can you fly with a vape in the USA?
Short answer
Yes, in your carry-on or on your person only. Vapes and spare lithium batteries are banned from checked baggage because of fire risk, and this is a firm federal rule. Using or charging a vape on board is prohibited on all US flights, and e-liquid over 3.4 oz must go in checked baggage — without the device.
Verified · 5 cited sources
The rule is the reverse of most people's instinct. Electronic smoking devices must travel in the cabin, never in checked baggage, because a lithium battery fire in the hold cannot be reached or fought. The FAA has documented incidents of vape devices igniting in luggage, which is why the prohibition is absolute rather than advisory.
The same applies to spare lithium batteries of any kind, which must be carried in the cabin with terminals protected against short circuit.
Devices should be switched off and protected from accidental activation. Airlines commonly ask that you remove removable batteries. Do not pack a device where pressure on the fire button is likely.
Using a vape on board is prohibited on every US commercial flight, as is charging one. Federal rules ban smoking and the use of electronic smoking devices on aircraft, and lavatory smoke detectors must not be tampered with — a separate and seriously enforced offense.
E-liquid follows the standard liquids rule: containers of 3.4 ounces or 100 mL or less in your quart-sized bag for carry-on. Larger bottles must go in checked baggage, which is permitted — it is the device and its battery that may not, not the liquid.
Cabin pressure changes cause tanks and pods to leak. Carrying the device in a sealed bag and, for refillable tanks, emptying or partly emptying before the flight avoids the usual mess.
International travel is a different problem entirely. Several countries ban the import or possession of e-cigarettes outright, with penalties including confiscation, substantial fines and in some jurisdictions imprisonment. A device that is legal to fly out of the US may be illegal to arrive with. Check the destination country's rules before you travel — this is the most common way travellers get into real trouble with a vape.
THC and delta-8 products are not covered by any of this. Aircraft and airports are federal jurisdiction throughout, including on flights between two states with legal cannabis. Do not fly with them.
- Carry-on or on your person only — never in checked baggage, because of lithium battery fire risk
- Using or charging a vape on board is prohibited on all US flights
- E-liquid over 3.4 oz / 100 mL must go in checked baggage, without the device
- Expect leaking from pressure changes — seal the device, empty refillable tanks
- Several countries ban vapes entirely — check the destination, not just the airline
Sources & provenance
Facts verified
- 1.Electronic Cigarettes and Vaping Devices OfficialTransportation Security AdministrationUsed for: Carry-on only, prohibited in checked baggage, and the requirement to prevent accidental activation
- 2.Lithium Battery Air Travel Safety RegulatorFederal Aviation AdministrationUsed for: Spare lithium batteries must travel in the cabin with terminals protected; documented incidents of devices igniting
- 3.Liquids Rule OfficialTransportation Security AdministrationUsed for: The 3.4 ounce / 100 mL carry-on limit applying to e-liquid
- 4.Prohibition on use of electronic cigarettes on aircraft LawFederal Register / Department of TransportationUsed for: Federal ban on using electronic cigarettes on US commercial flights
- 5.Medical Marijuana OfficialTransportation Security AdministrationUsed for: TSA screening posture and referral to law enforcement; federal jurisdiction over aircraft
Carry-on rules, the checked baggage prohibition, the liquids limit and the on-board use ban come from the TSA, FAA and Department of Transportation sources cited. Airline-specific requirements — such as removing batteries — vary and are set by the carrier, so check yours. Destination country rules on importing e-cigarettes vary enormously and several countries prohibit them entirely; we do not list them because they change and getting one wrong has serious consequences. Check the destination country's own customs authority.
Facts on this page are taken from the sources listed above — U.S. federal agencies, state governments, regulators and official statistical releases. Comparisons, judgments and "which option suits whom" conclusions are AI-assisted analysis written over those sources; they are marked in the text and listed as an AI-analysis entry in the sources, not attributed to any authority. Rates, thresholds, fees and processing times change, often at the start of a calendar or tax year; figures are current as of the review date shown and should be confirmed with the responsible agency before you rely on them. A great deal of American law is state law — where a rule differs by state, this site says so.