The short answer
Yes. Stick deodorant is a solid and can be any size in your carry-on. Gel, roll-on, cream and spray deodorants count as liquids and must be 3.4 oz (100 ml) or less, inside your quart-size liquids bag.
Carry-on vs checked bag
| Item | Carry-on | Checked bag |
|---|---|---|
| Stick deodorant (solid) | AllowedAny size | Allowed |
| Gel / clear-gel stick | Limits3.4 oz (100 ml) or less | Allowed |
| Roll-on | Limits3.4 oz (100 ml) or less | Allowed |
| Spray / aerosol | Limits3.4 oz (100 ml) or less | AllowedUp to 18 oz per can |
| Cream deodorant | Limits3.4 oz (100 ml) or less | Allowed |
Is your deodorant a liquid?
Use TSA’s own test: if you can spill, spread, spray, pump or pour it, it is a liquid. A classic white solid stick is not. A clear gel stick usually is, because it smears like a gel. When in doubt, buy a travel size under 3.4 oz and you will never be stopped.
Aerosols in checked bags
Spray deodorant is allowed in checked luggage, within the FAA limit for toiletries: no more than 18 oz (500 ml) per container and 70 oz (2 kg) of toiletry aerosols and liquids in total per person. Caps must be on to stop the nozzle firing.