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Short answer

Leaving from STN: uses the 100 ml / 3.4 oz rule. For return / onward travel via DUB: has mixed / terminal-specific rules.

Rules differ at each airport and at the destination border — read the breakdown below.

Outbound airport security

London Stansted (STN) uses the 100 ml / 3.4 oz rule.

Outbound
100ml only
STNLondon Stansted
London · United Kingdom
Official source monitoredairport
Max container
100ml
Clear bag
Required
Remove from bag
Required
Confidence
high
Stansted AirportLast verified 2025-05-20
Return / onward airport security

Dublin (DUB) has mixed / terminal-specific rules.

Return / onward
Mixed / check terminal
DUBDublin
Dublin · Ireland
Based on official airport-operator guidanceairport operator
Max container
100ml
Clear bag
Required
Remove from bag
Required
Confidence
medium

C3 scanner rollout in progress; default to 100 ml / 1 L bag unless lane signage explicitly states otherwise.

Dublin Airport (daa)Last verified 2026-05-28
Dublin has terminal-specific rules

Some terminals at Dublin use 100 ml, others allow more. Pack to 100 ml unless your terminal is signed otherwise.

Safest packing recommendation
Pack to 100 ml for the round trip

One airport allows larger containers and the other doesn't. If you need the liquid for return or onward travel, use 100 ml containers.

Exemptions worth knowing
  • Duty-free liquids in sealed STEB bags with the receipt.
  • Essential medicines — declare at security.
  • Baby food and baby milk for travelling infants.
  • Special dietary needs may be considered case-by-case.
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LiquidLimits.com is a travel planning tool, not an official airport or government source. Rules can change between trips and between terminals. Always check the official airport or aviation security guidance before you travel, and when in doubt pack to the stricter 100ml cabin-bag rule.