TSA's 3-1-1 Rule Still Applies in 2026 The standard limit for liquids in carry-on luggage on US flights remains the TSA's 3-1-1 rule: containers of 3.4 ounces (100 ml) or smaller, all fitting into one quart-sized (1 liter), clear, resealable plastic bag per passenger.

Core Carry-On Limits

  • Container size : No more than 3.4 oz (100 ml) per bottle, even if partially full—larger containers like 4 oz are banned.
  • Bag requirement : Everything must fit in a single 1-quart clear zip-top bag (about 7x8 inches); only one bag allowed per person.
  • Screening process : Remove the bag from your carry-on at security for X-ray inspection.

This rule, in place since 2006 for security reasons, hasn't changed for most US airports as of February 2026.

Checked Bag Differences

Checked luggage has fewer restrictions on liquids.

Category| Carry-On| Checked Bags
---|---|---
Liquids/Gels| 3-1-1 rule only| Generally unlimited volume 1
Alcohol| Follows 3-1-1| Up to 5L (24-70% ABV); over 70% prohibited 1
Other Items| Aerosols, creams, pastes included| No container limits, but weight rules apply 1

International Variations

Rules differ outside the US—always check your departure airport.

  • UK airports (e.g., Heathrow, Gatwick): New CT scanners allow up to 2 liters per container in hand luggage at select spots, no bag removal needed.
  • Europe : Some airports have scrapped the 100ml limit for larger containers with new tech, but it's patchwork—verify ahead.
  • Duty-free exception : Liquids bought after security in tamper-evident bags are okay carry-on worldwide.

Exceptions and Tips

Certain items bypass the 3-1-1 rule with precautions:

  1. Medications : Larger amounts allowed; declare and screen separately (bring prescription if needed).
  1. Baby essentials : Formula, breast milk, juice—reasonable amounts; notify TSA officer.
  1. Contact lens solution : Up to 3.4 oz, or more with doctor's note.

Pro packing hacks :

  • Use travel-sized bottles or decant into 100ml containers.
  • Double-bag to prevent leaks—wrap openings with plastic wrap or tape caps.
  • Download the TSA app's "What Can I Bring?" tool for item-specific checks.

Recent Buzz and Reliability

As of early 2026, no widespread US changes despite scanner upgrades elsewhere—no "liquid anxiety" relief stateside yet. Forums echo frustration over tossing half-full lotions, but compliance avoids delays. Trending chatter highlights UK/EU scanner perks, fueling hopes for TSA updates soon.

TL;DR : Stick to 3.4oz max per container in a 1-quart bag for US carry- ons; checked bags are freer. Rules evolve—check tsa.gov before flying.

Information gathered from public forums or data available on the internet and portrayed here.