Leaving from PDX: has no verified rule yet. For return / onward travel via LHR: allows liquids up to 2 L.
Rules differ at each airport and at the destination border — read the breakdown below.
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Portland (PDX) — no verified rule yet; guidance pending source review.
- Max container
- 100ml
- Bag rule
- Must remove, in clear bag
- Clear bag
- Required
- Confidence
- high
TSA 3-1-1 rule: containers up to 3.4oz (100ml) in a 1-quart bag, applied at every US airport.
London Heathrow (LHR) allows liquids up to 2 L.
- Max container
- 2L
- Bag rule
- Liquids can stay in bag
- Clear 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.
London has upgraded scanners — liquids up to 2 L are currently permitted in cabin. Rules can revert; confirm before flying back.
One airport is unverified — default to 100 ml unless you confirm otherwise locally.
- 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.