Can you take sourdough starter in hand luggage?
Active starter is a liquid/paste — over the cabin limit it goes in the hold.
Rule basis: Treated as a food liquid at airport security. Based on general aviation security guidance — rules can vary between airports.
What to do: Default to 100ml per container in a single 1-litre clear bag. Anything larger goes in checked luggage.
Liquid Limits is a travel planning tool, not an official aviation source. Always confirm with the airport before you travel.
Triple-check
Security · Airline · Border
Will sourdough starter pass the checkpoint?
LimitedSourdough starter usually counts as a liquid, gel or paste — must fit the 100ml hand-luggage rule.
Can sourdough starter travel in cabin or checked baggage?
Cabin OKFine in cabin baggage within the 100ml rule, and fine in checked baggage if sealed.
Can you bring sourdough starter into the destination country?
Usually OKPersonal-use quantities are rarely a customs problem on most routes.
Three separate rule systems · Any one can stop your item
In cabin baggage
Security treats spreadable, pourable or pasty foods as liquids/gels. The 100ml container rule applies even though it's food. A 250g jar will be confiscated at any airport on the 100ml rule, no matter how full it is.
In checked luggage
Pack in a sealed container with room to breathe — gas builds up at altitude.
Separate customs, airline, or import rules may apply. Check official guidance.
Drying your starter onto baking paper makes it not-a-liquid for the flight. Reactivate at the destination.
Examples
- •50g pot of active starter: cabin OK
- •Dried starter flakes: not a liquid at all
Liquid Limits focuses on airport security and liquid-like travel items. Separate customs, import, airline, or destination laws may apply. For non-liquid items like plants, meat, weapons, cash, electronics, or luxury goods, check official customs guidance. What this site covers and doesn't cover.
Liquid Limits helps with airport security rules. Border and customs rules vary by destination, so always check official destination guidance before travelling internationally.
Check your airport liquid rulePacking checklist for sourdough starter
A short checklist for this trip — pack what you need to stay within the rules above.
Decant into 100ml bottles for the cabin.
Standard 1-litre clear bag for security.
Double-bag in case of pressure leaks.