For busy mothers, the word “airport” can bring to mind long security lines and the stress of waiting at every step. When traveling with breast milk, navigating air travel rules and procedures may feel especially overwhelming. MidAmerica St. Louis Airport (BLV) is here to answer frequently asked questions and help put travelers at ease as they plan their trip.
Navigating Airport Security
Preparing to navigate airport security can start before you even arrive at the airport. By researching TSA Cares, travelers who are flying with children or breast milk can better understand what to expect during screening. Airport security officers are trained in hygiene standards related to breast milk and other infant feeding items, helping ensure a respectful and safe screening process.
The TSA website outlines official TSA guidelines and packing tips, confirming that ice packs and breast milk in a labeled bag exceeding 3.4 ounces are permitted in carry on baggage. Screening may involve advanced imaging technology screening, which is safe for travelers and their items. Some families also choose services like Milk Stork to support breast milk transport during travel.
To feel more prepared, travelers may review TSA scripts ahead of time to help guide conversations with officers before screening begins. Wearing practical clothing, such as a nursing friendly top, can also make the process easier and more comfortable while moving through security.
Frequently Asked Questions and Troubleshooting
One of the most common concerns involves TSA weight or size restrictions for liquids in carry on baggage. Breast milk, however, is considered a medically necessary liquid and qualifies for a medical exemption, meaning it does not need to follow the 3.4 ounce rule or fit inside a quart sized bag.
This exemption also applies to ice packs and other items used to safely transport and preserve expressed milk, including proper cooler packing. Letting airport security officers know you are traveling with breast milk before starting the screening process can help make the experience smoother, especially during busy travel periods or unexpected flight delays.
X ray screening does not damage breast milk, formula or pureed baby foods. However, travelers may request alternative screening procedures if they are not comfortable with X ray screening. This can be discussed with TSA PreCheck staff or security officers at the checkpoint. In some cases, additional steps such as thawed milk testing may be required to complete the screening process.
Breast milk is allowed through all stages of screening, including boarding and gate check, making it easier for travelers to continue their journey with confidence.
Packing and Storage Methods
When traveling with breast milk, there are several packing and storage options to consider. Some travelers prefer using an insulated cooler filled with breast milk storage bags, while others opt for BPA free plastic containers, clear or translucent bottles or an insulated thermos. Both soft sided coolers and rigid containers can work well depending on your travel needs and available space.
While there is no single right approach, it’s important to keep breast milk at a properly cool temperature to protect its safety and quality during transit. Cooling accessories such as gel packs, a compact refrigerator or a watertight freezer bag offer convenient and compact ways to keep milk chilled while on the move. Many storage bags feature a double zip seal, which helps prevent leaks and adds an extra layer of protection.
Fully or partially frozen breast milk is also permitted and follows a similar screening process. As frozen milk begins to thaw, using a watertight freezer bag or placing storage containers inside a soft sided cooler can help manage moisture and maintain temperature throughout your journey.
Pumping and Feeding Logistics While Traveling
Flying with breast milk involves more than packing milk storage bags. Babies often follow a feeding schedule, or at least have consistent needs, and BLV understands how important it is for parents to have access to comfortable and private spaces. We’re proud to offer a private nursing room on the second floor near Gates 1 and 2, giving parents a quiet place to feed or pump.
Many other airports also feature private lactation rooms, dedicated lactation suites or freestanding Mamava® Nursing Pods, where travelers can set down their electric breast pump, manual breast pump or battery powered breast pump, along with pump accessories such as breast pump backpacks, hands free pumping bras, breast pump–specific wipes and sanitizer sprays. These spaces make it easier to pump comfortably, clean equipment and manage feeding needs while on the go.
The Mamava app uses your location to help find a nearby pod, making it easier to locate a convenient place to pump or feed and helping take one more task off an already busy travel day.
TSA and Airline Regulations
Breast milk is included in the BABES Enhancement Act, passed in late 2025. The act (short for Bottles and Breastfeeding Equipment Screening) strengthens guidelines around traveling with breast milk by emphasizing improved TSA officer training, clearer screening procedures and respectful handling of pumping supplies.
As part of this effort, TSA has enhanced its screening process to ensure consistent treatment of medically necessary liquids. The act also supports clearer guidance during TSA compliance audits and allows travelers to make a separate declaration for breast milk and related items at security checkpoints, helping streamline the experience for nursing parents.
Shipping Breast Milk
Some parents prefer to skip airport screening and use a breast milk shipping service instead. Carriers such as FedEx and DHL allow travelers to avoid concerns with checked luggage and carry on rules while shipping milk for non commercial use. Many employers cover the cost of these services, making both domestic breast milk shipping and international breast milk shipping more accessible.
When shipping internationally, travelers should check for country specific documentation and customs requirements, which may vary by destination.
Use and Handling of Dry Ice
For longer travel days or flights lasting more than 12 hours, dry ice can be used to keep breast milk frozen when packed in a foam cooler or other air-tight container. Allegiant flying out of BLV allows dry ice in checked baggage when it meets TSA and FAA guidelines.
Dry ice is one of several temperature control accessories available, along with options like a milk chiller, mini fridge or overnight express shipping. After use, dry ice should be safely disposed of in a well ventilated area, using gloves and following local regulations.