How much liquid can you bring in checked luggage: analysis of the latest aviation regulations and hot topics
Recently, with the arrival of the summer travel season, air baggage regulations have once again become a hot topic. Many travelers have questions about the restrictions on liquids, especially the differences between international flights and domestic flights. This article will combine the hot content of the entire network in the past 10 days, analyze the liquid shipping regulations in detail, and provide structured data for reference.
1. Overview of Liquid Consignment Regulations

According to the regulations of the International Civil Aviation Organization (ICAO) and national aviation administrations, the carriage of liquid items is mainly divided intoCarry-on luggageandChecked baggageTwo categories. Here are the core takeaways:
| Category | Carry-on baggage restrictions | Checked baggage restrictions |
|---|---|---|
| Single bottle capacity | ≤100ml | No hard limit |
| total capacity | ≤1L (transparent sealed bag required) | Usually ≤5L (except for some airlines) |
| Special liquids (such as alcohol, drugs) | Need to declare | Must comply with flammable materials regulations |
2. Recent hot and controversial topics
1."Cosmetics consignment confiscated" incident: A passenger was detained by airport security for checking in more than 100ml of perfume, triggering a discussion on liquid packaging regulations.
2.International flight differences: Some European airports have additional restrictions on the total amount of liquids in checked baggage (such as ≤2L per piece).
3.Drug Exemption Policy: Diabetic patients carrying liquid medicines such as insulin must issue a certificate in advance, otherwise they may be refused.
3. Comparison of specific regulations of airlines
The following are the latest requirements for liquids checked by major airlines (data updated to July 2023):
| airline | Total liquid limit for checked baggage | Special instructions |
|---|---|---|
| Air China | ≤5L | Alcohol ≤70% concentration |
| China Southern Airlines | ≤5L | Requires independent packaging to prevent leakage |
| American Airlines | ≤2L (single bottle ≤500ml) | Perfume needs to be declared separately |
| Emirates Airlines | No total amount limit | Flammable liquids prohibited |
4. Practical suggestions
1.Packaging strategy: Dispense liquid into small bottles of less than 100ml, which can be carried with you or checked in.
2.Declaration in advance: Special liquids (such as medical supplies) are recommended to be reported to the airline when purchasing tickets.
3.Pay attention to destination regulations: For example, Japan has stricter requirements for shipping alcoholic items than China.
5. Frequently Asked Questions
Q: Are toothpaste and gel considered liquids?
A: Yes, ICAO classifies both paste and gel-like items as liquids.
Q: Will consigned liquids freeze?
A: The temperature in the high-altitude cargo hold may be below 0°C. It is recommended to avoid consigning liquids that are prone to freezing (such as certain skin care products).
Q: Are there any exceptions for infant formula?
A: Some airlines allow excess carry-on, but it requires on-site opening and inspection.
Summary: Liquid consignment regulations vary by airline and route. It is recommended to confirm the latest policy through the official website or customer service before traveling. Properly planning your luggage content can avoid unnecessary troubles during your journey.
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