Breast Milk Through Airport Security Without Your Baby
5 min readSources checked
Airline and government rules change. Check your airline's current rules before you travel.
Quick answer
Yes, in Canada and the United States. CATSA permits breast milk over 100 ml whether or not your child is travelling with you, provided you present it for inspection before screening. TSA says your child does not need to be present or travelling with you. Cooling packs are allowed at both.
Being allowed through screening with milk and being allowed an extra bag for it are separate questions. The screening authority at each airport decides the first and the airline decides the second. This guide covers the screening rules in Canada and the United States, the Canadian formula condition that is easy to confuse with the breast milk rule, and a plan for the outbound and return journeys.
Scope: Security screening in Canada (CATSA) and the United States (TSA). It does not cover screening in other countries, border or customs rules, airline bag allowances, or how long milk stays safe to use.
Part of: Flying with a Baby, Flying for Business
What changes by airline
- Whether a cooler or pump bag counts toward the carry-on allowance
- Whether an extra bag for milk and supplies carries a fee
- Whether an unusual cooling method is accepted onboard
Official rules: Canada
Breast milk at Canadian screening
CATSA permits passengers flying with or without their child to bring breast milk in quantities greater than 100 ml, provided it is presented to the screening officer for inspection before screening. Gel or ice packs are also permitted.
The allowance to carry it does not mean it skips inspection, so present it before your bag goes through.
Official rules: Canada
Formula follows a different Canadian rule
CATSA's allowance for liquid baby formula, baby food, juice and water in quantities greater than 100 ml applies only when you are travelling with an infant under two years of age. Travelling without your child, that allowance does not cover them, while the breast milk entry does.
If you are unsure how something unusual will be treated, such as a particular cooling setup or another liquid, ask CATSA about the exact items before you leave.
Official rules: United States
At a U.S. checkpoint
TSA considers breast milk a medically necessary liquid. Quantities greater than 3.4 ounces or 100 millilitres are allowed in carry-on baggage and do not need to fit in a quart-sized bag, and your child does not need to be present or travelling with you. Ice packs, freezer packs and gel packs for cooling are allowed too. Unlike CATSA, TSA applies the same no-child allowance to formula.
Tell the TSA officer at the beginning of screening that you are carrying breast milk, and take it out of your bag to be screened separately. Officers may need to test the liquid. TSA recommends clear, translucent bottles rather than plastic bags or pouches, which may have to be opened for other screening. If you do not want the milk X-rayed or opened, tell the officer, and expect additional screening of you and your carry-on.
The CDC adds that pumps and pump kits can go with you through the checkpoint and onboard.
General advice: applies wherever you fly
Describe the contents plainly
Write down what is in the cooler before you leave: the milk, the containers and the cooling packs. "I am carrying expressed breast milk and cooling packs. My child is not travelling with me. How would you like me to present them?" gives the officer something specific to work with.
If there is a disagreement, ask the officer to check the breast milk procedure, and ask whether a supervisor can clarify it. A screenshot from social media is not the rule. Keep the official page for the airport you are leaving from on your phone.
General advice: applies wherever you fly
Plan the outbound and return journeys separately
For each direction, note the airport where you will be screened, save that authority's rule, and record the airline's answer about your cooler and pump bag. Add a line for any connection that includes another security check. The authority screening you at that airport sets the checkpoint rule, whatever your destination or airline.
A smooth outbound screening does not settle the return, which may start at an airport with a different screening authority.
General advice: applies wherever you fly
Cooling and storage need their own plan
Being allowed through security says nothing about how long your milk stays usable. Use the CDC's current storage guidance, and ask your health professional where your situation needs it. This checklist does not calculate storage times.
Before choosing accommodation, ask what refrigeration the property actually offers and whether it meets your needs. Include the trips to and from the airport in the plan. If you use an unusual cooling method, confirm it with both the airline and the screening authority.
General advice: applies wherever you fly
Checklist
Checklist
- Identify the screening authority at the outbound and return airports
- Keep breast milk separate from formula and other liquids
- Save the official rules for offline use
- Check the cooler and pump bag allowance with the airline
- Pack the containers and cooling packs so they are easy to present
- Plan cooling and storage at the destination
- Allow time for inspection and repacking
- Count the containers and accessories before leaving the checkpoint
General advice: applies wherever you fly
Next step
Look up the screening rule at the airport you fly home from, then ask the airline about your cooler and pump bag.
Official sources
Rules and amounts change. Before you rely on anything marked as an official rule, check the source. These are the official pages we used.
- Breast milk · Canadian Air Transport Security Authority (CATSA)
- Baby formula · Canadian Air Transport Security Authority (CATSA)
- Breast Milk · Transportation Security Administration (TSA)
- Travel Recommendations for Nursing Mothers · Centers for Disease Control and Prevention (CDC)
- Breast Milk Storage and Preparation · Centers for Disease Control and Prevention (CDC)
Next step
Flying with a BabyRelated guides
- One Adult Flying with Two Young ChildrenThe Canadian rule that decides whether one adult can fly with two infants, how to confirm the seat plan before paying, and how to manage the airport with one free hand.
- How to Choose the Right Seat for Your Travel SituationAisle, window, bulkhead or exit row: how to choose an airplane seat based on who you're flying with, and the U.S. rules that limit some choices.
- Flying with Kids: An Age-by-Age GuideIdeas that can help at each age, from infants to teens, plus Canada's family seating rules, the U.S. DOT seating dashboard and the AAP's advice on ears and car seats.
- When to Book Flights: What Holds Up and What Doesn'tWhy there's no reliable best day to book, what you can actually control, and the U.S. 24-hour reservation rule.