What Can You Bring Through Airport Security and How Screening Works

Instantly check what items are allowed through TSA airport security. Search any item to see if it's permitted in carry-on or checked baggage.

How Airport Security Screening Works

Before boarding a flight, all passengers and their belongings pass through security checkpoints where officers inspect carry-on items and verify identities. Certain items may be restricted or require special handling depending on their type, size, or contents.

Browse by Category

  • Liquids, Gels & Aerosols — TSA 3-1-1 rule and what liquids you can bring
  • Food Items — What food is allowed through security
  • Electronics & Batteries — Rules for laptops, phones, and batteries
  • Prohibited Items — Items banned from flights
  • Marijuana, Cannabis & CBD — Federal rules for cannabis products
  • Medical & Mobility Items — Rules for medications and devices

Trusted Traveler Programs

  • TSA PreCheck — Expedited security screening
  • CLEAR — Identity verification at airports
  • Global Entry — Expedited customs for international travelers
  • NEXUS — US-Canada trusted traveler program

Frequently Asked Questions

What is the 3-1-1 liquids rule?

The 3-1-1 rule requires that liquids, gels, aerosols, creams, and pastes in carry-on bags be in containers of 3.4 ounces (100ml) or less. All containers must fit in one quart-sized, clear, resealable plastic bag. Each passenger is allowed one plastic bag.

What items should I take out of my bag at security?

Generally, you should remove laptops and large electronics from your bag, as well as your quart-sized bag of liquids. TSA PreCheck members can often leave these items in their bags. Remove jackets, belts, and shoes as directed.

Can I bring food through airport security?

Solid food items are generally allowed in both carry-on and checked bags. However, spreadable foods (peanut butter, hummus, yogurt) are considered liquids and must follow the 3-1-1 rule.

Are medications allowed through security?

Yes. Prescription and over-the-counter medications are allowed in both carry-on and checked bags. Liquid medications exceeding 3.4 oz are permitted but must be declared at the checkpoint.

What happens if I accidentally bring a prohibited item?

If a prohibited item is found, you'll typically have options: return it to your vehicle, give it to a non-traveling companion, mail it to yourself, surrender it to TSA, or check it in your luggage if time permits.

Can I travel with lithium batteries?

Yes, but with restrictions. Batteries under 100 watt-hours are allowed. Spare lithium batteries must be in carry-on luggage, not checked bags. Batteries between 100-160Wh require airline approval.

Are rules the same at all airports?

While TSA rules are consistent across U.S. airports, enforcement may vary slightly by location. International destinations may have different rules. When in doubt, pack questionable items in checked baggage.

What items are always prohibited?

Explosives, flammable items, certain chemicals, and weapons are prohibited in both carry-on and checked bags. This includes fireworks, flares, gasoline, strike-anywhere matches, and realistic replica weapons.