Quick rules for flying with liquids in carry-on and checked baggage. Verdicts and conditions across the major aviation regions below.
3-1-1 rule: containers of 3.4 oz (100 ml) or less, all fitting in one clear quart-sized bag, one bag per passenger. Larger containers must go in checked luggage. Exceptions: medicine, baby formula, breast milk.
100 ml rule: liquids in containers ≤100 ml, all in one transparent 1-litre resealable bag. Some EU airports with new CT scanners are easing this — check your departure airport.
100 ml limit per container, all in one 1-litre clear bag. UK airports are transitioning to 2-litre allowances with new scanners — check your specific airport for current rules.