311 for Carry-ons - Rules for Transporting Liquids and Gels in Carry-on Luggage

The 3-1-1 for carry-ons policy was implemented by TSA in response to the thwarted liquid explosive bomb plot in the United Kingdom in August of 2006. Today, the wide-spread acceptance of that policy demonstrates the international understanding of the threat to aviation from liquid explosives.

TSA and our partners conducted extensive explosives testing since August 10 and determined that these items, in limited quantities, are safe to bring aboard an aircraft. The one bag limit per traveler limits the total amount each traveler can bring. Consolidating the bottles into one bag and X-raying separately enables security officers to examine the declared items. By reducing clutter in the carry-on bag, security officers can more easily find prohibited items within the bag.

3-1-1 for carry-ons = 3.4 ounce (100ml) bottle or less (by volume) ; 1 quart-sized, clear, plastic, zip-top bag; 1 bag per passenger placed in screening bin. One-quart bag per person limits the total liquid volume each traveler can bring. 3.4 ounce (100ml) container size is a security measure.

Consolidate bottles into one bag and X-ray separately to speed screening.

Be prepared. Each time TSA searches a carry-on it slows down the line. Practicing 3-1-1 will ensure a faster and easier checkpoint experience.

3-1-1 is for short trips. If in doubt, put your liquids in checked luggage.

Declare larger liquids. Medications, baby formula and food, and breast milk are allowed in reasonable quantities exceeding three ounces and are not required to be in the zip-top bag. Declare these items for inspection at the checkpoint.

Come early and be patient. Heavy travel volumes and the enhanced security process may mean longer lines at security checkpoints.

311 Compliant Resources for Carry-ons