Airport Security Rules Explained — 2026 Complete Update

Everything You Need to Know About Airport Security in 2026

Airport security rules evolve constantly. This updated guide covers the latest regulations across UK, EU, US, and international airports.

The Liquids Rule

The 100ml liquids rule remains in effect at most airports worldwide:

• Containers: Each liquid, gel, paste, or cream must be in a container of 100ml or less
• Clear bag: All containers must fit in a single clear, resealable plastic bag (maximum 1 litre / 20cm x 20cm)
• One bag per person: Each passenger is allowed one liquids bag

CT Scanner Exceptions

Airports with next-generation CT scanners are beginning to relax the liquids rule. As of 2026, some terminals at London Heathrow and select European airports allow liquids up to 2 litres without removing them from your bag. Check your specific airport before travelling.

Electronics

• Standard airports: Remove laptops, tablets, and large cameras from bags and place in a separate tray
• CT scanner airports: Electronics can stay in bags
• Smart devices: Phones and smartwatches do not need to be removed

What You CAN Bring

• Solid food (sandwiches, fruit, snacks)
• Empty water bottles (fill after security)
• Medication (with prescription for controlled substances)
• Baby milk and formula (exempt from 100ml rule)
• Duty-free liquids purchased airside
• Books and magazines
• Portable chargers and power banks

What You CANNOT Bring

• Sharp objects (knives, scissors over 6cm)
• Firearms and replicas
• Explosives and flammable items
• Tools over 7cm
• Sports equipment (bats, clubs)

See our detailed what to bring through security guide for the complete list.

Country-Specific Rules

UK Airports

• 100ml liquids rule in effect
• Some Heathrow terminals have CT scanners allowing larger liquids
• Powders over 350ml may be screened separately

EU Airports

• Standard 100ml rule across the Schengen area
• New EES (Entry/Exit System) border checks will add time at immigration — read our EU EES & ETIAS Guide
• CT scanner rollout varies by airport

US Airports (TSA)

• 3-1-1 rule: 3.4oz (100ml) containers in 1 quart-size bag, 1 per person
• TSA PreCheck allows laptops and liquids to stay in bags
• REAL ID required for domestic flights from May 2025

How to Speed Through Security

1. Book FastTrack security at your airport
2. Prepare liquids and electronics before reaching the queue
3. Wear slip-on shoes and avoid belts with metal buckles
4. Check estimated wait times for your travel date