Airport Security Tips: What Not to Bring on a Plane

It’s common sense that you shouldn’t bring weapons like guns or knives onto a plane—but there are other, less obvious items that can cause trouble at airport security, both in the U.S. and Europe. Over the years, I’ve learned which things tend to be flagged, confiscated, or delayed at TSA checkpoints and European airport screenings. Here’s what to watch out for:

Cheese
Surprisingly, I’ve had cheese—especially French and Italian varieties—confiscated more than once. My guess is that it resembles certain materials on the scanner. The safe way? Buy it after you pass through security.

Soap
Full bars of soap can also raise suspicion, likely for similar reasons as cheese. Stick to liquid soap under the TSA liquid limit, or purchase locally after arrival.

Toys
Make sure any toy you pack—no matter how small—doesn’t resemble a weapon. I once saw a tiny toy pistol from a “Pirates of the Caribbean” souvenir shop confiscated at Charles de Gaulle Airport.

Booze
Mini liquor bottles under 4 oz are allowed in carry-ons, but don’t drink them on board. It’s a serious offense and can lead to fines.

Contraband
That Cuban cigar you picked up in Europe? It won’t make it past security in many countries, and it will be confiscated.

Grooming Aids
Scissors, metal nail files, and clippers can be taken away if they’re too large. A good rule: cutting blades should be shorter than four fingers pressed together.

Aerosol Cans
Over 4 oz? Forget it. Buy hairspray, deodorant, and similar items after arrival.  We always say to travelers on our tours that "you have not left the planet" and many of the items you get at home, you can get on the road. 

Tools
Believe it or not, I’ve seen hammers, pliers, and files in airport confiscation boxes when traveling on our small group tours. Leave them at home or check them in luggage.

Coins
While not banned, a heavy stash of coins might get you flagged for further inspection.

Pro Packing Tip
If you’re unsure whether an item might be questioned, put it in a small plastic bag for easy removal. This way, if security wants to inspect it, they don’t have to unpack your entire carry-on—saving you time and possibly a missed connection.

With these airport security tips, you can avoid unnecessary stress and make your trip start smoothly.