What Are Carry-On Restrictions for International Flights

International carry-on restrictions follow TSA 3-1-1 liquid rules (containers 3.4oz or smaller in 1 quart bag), prohibit sharp objects and large electronics over laptop size, and limit bags to roughly 22x14x9 inches weighing under 15-22 pounds depending on airline.

  1. Check your airline's size and weight limits. Most international carriers allow 22x14x9 inches (56x36x23cm) but some budget airlines are smaller. Weight limits range from 15-22 pounds. Check your specific airline's website before packing.
  2. Pack liquids in 3-1-1 format. All liquids, gels, and aerosols must be in containers 3.4oz (100ml) or smaller, fit in one clear quart-sized bag, and be easily removable at security. This includes toothpaste, shampoo, and contact solution.
  3. Remove prohibited sharp objects. No knives, scissors over 4 inches, razor blades, or tools longer than 7 inches. Small nail clippers and tweezers are usually fine but check current TSA lists as rules change.
  4. Prepare electronics for screening. Laptops and tablets larger than a phone must be removed from bags at most security checkpoints. Keep chargers and cables organized for easy inspection.
  5. Pack medications and essentials smartly. Prescription medications can exceed liquid limits but declare them at security. Pack a change of clothes and essential medications in carry-on in case checked bags are delayed.
Can I bring food in my carry-on?
Yes, but solid foods are easier than liquids. Sandwiches, fruit, and snacks are fine. Yogurt, soup, and sauces count as liquids and must follow 3-1-1 rules.
Are carry-on rules the same worldwide?
Mostly yes for size and liquids, but some countries have additional restrictions. Australia prohibits certain foods, and some Asian airports have stricter electronics rules.
What happens if my carry-on is too big?
Gate agents will make you check it, often for $50-100+. Size-check bins at check-in counters let you test your bag before security.
Can I bring duty-free liquids on connecting flights?
Only if they're in sealed tamper-evident bags from the airport shop. If you have to re-clear security on connections, regular liquid rules apply.