You can bring liquids on a plane in containers of 100 ml (3.4 ounces) or less each, and all these containers must fit into a single transparent, resealable quart-sized (about 1 liter) bag for carry-on luggage. This is commonly known as the 3-1-1 rule: 3.4 oz containers, 1 quart-sized bag, 1 bag per passenger
. Some key details and exceptions include:
- The total liquid volume in carry-on must fit in one quart-sized bag. If you have more liquids, they must go in checked baggage or be distributed among other travelers' bags if they have room
- Prescription medications, baby formula, breast milk, and other infant nourishment can exceed the 100 ml limit and do not need to be in the quart-sized bag but must be declared at security
- Liquids bought at duty-free shops or on the plane can exceed 100 ml if they remain sealed in the security bag with the receipt
- Some airports with advanced 3D CT scanners allow liquids to remain in bags during screening but still enforce the 100 ml container size limit
- The 100 ml liquid rule is expected to be phased out in the future in some regions, with plans to allow up to 2 liters of liquids per passenger in carry-on, but this has been delayed and is not yet widely implemented
In summary, for most flights today, you are allowed to carry liquids in containers of 100 ml or less, all fitting into one quart-sized bag in your carry-on. Larger quantities of liquids must be checked or fall under specific exemptions.
