Leaving from LHR: allows liquids up to 2 L. For return / onward travel via SIN: uses the 100 ml / 3.4 oz rule.
Rules differ at each airport and at the destination border — read the breakdown below.
London Heathrow (LHR) allows liquids up to 2 L.
- Max container
- 2L
- Clear bag
- Not required
- Remove from bag
- Not required
- Confidence
- high
CT scanners rolled out across all terminals — liquids up to 2 L now permitted in cabin. Rules can revert; confirm before flying.
Singapore Changi (SIN) uses the 100 ml / 3.4 oz rule.
- Max container
- 100ml
- Clear bag
- Required
- Remove from bag
- Required
- Confidence
- high
Standard 100 ml rule, single transparent resealable 1 L bag. CT scanners present in some lanes but 100 ml limit remains the published rule.
If you go through security again at Singapore (return or onward flight), liquids must be in containers of 100 ml / 3.4 oz or less inside one clear bag.
One airport allows larger containers and the other doesn't. If you need the liquid for return or onward travel, use 100 ml containers.
- 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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Get a copy of your airport liquid rules and packing recommendation before you fly.
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.