For carry-on baggage, only bring personal medicinal and toilet items. Examples include hairspray, deodorant spray, asthma inhalers, mosquito repellent, and shaving cream. Personal medicinal and toilet items may use a flammable propellant and still be permitted on-board (subject to TSA security rules.)

For checked baggage, you may travel with personal medicinal and toilet aerosols, plus other non-flammable aerosols. Examples may include:

• Aerosol foods (whipped cream or cheese spray are often non-flammable)
• Some aerosol electronic cleaners
• Some flat tire repair aerosols

Some manufacturers use flammable propellants in these products. Check the can. If you see the words flammable, inflammable, propane, butane, isopropane, or petroleum distillates, then it's a flammable aerosol.

Travel with the cap on your aerosol can, whether it is in checked or carry-on baggage.

Some cans have a release button recessed into their tops, or other protection for the release device - these are also safe.

Most aerosols are hazardous materials, whether by virtue of the propellant (almost all flammable,) or the dispersible contents. These are subject to quantity limits in addition to the TSA security limits.

Always obey the quantity limits for aerosols. You can see the quantity limits for aerosols here.