You may want to consider either reconstituting when you get where you want to be, so you dont have to chill on the first leg of travel, or reconstituting and placing in syringes, and then just chilling the syringes. I assume you can bring loaded insulin syringes on a plane. Anyone know? If not, you can always check your luggage, though I think luggage sometimes gets quite warm under the plane, so I've heard.
This is off TSA.GOV website. This is for carry on. Checked it is ok for sure.
All medications in any form or type (for instance, pills, injectables, or homeopathic) and associated supplies (syringes, Sharps disposal container, pre-loaded syringes, jet injectors, pens, infusers, etc.) are allowed through the security checkpoint once they have been screened. Atropens, an auto-injection system that can help treat many emergency conditions (low heart rate, breathing problems, and excess saliva related to insecticide, nerve gas or mushroom poisoning) are also allowed.
Medications must be labeled so they are identifiable.
Carbon dioxide (CO2) migraine inhalers and CO2 refills.
Medications in daily dosage containers are allowed through the checkpoint once they been screened.
Medication and related supplies are normally X-rayed. However, as a customer service, TSA now allows you the option of requesting a visual inspection of your medication and associated supplies.
You must request a visual inspection before the screening process begins; otherwise you medications and supplies will undergo X-ray inspection.
If you would like to take advantage of this option, please have you medication and associated supplies separated from your other property in a separate pouch/bag when you approach the Security Officer at the walk-through metal detector.
Request the visual inspection and hand your medication pouch/bag to the Security Officer.
In order to prevent contamination or damage to medication and associated supplies and/or fragile medical materials, you will be asked at the security checkpoint to display, handle, and repack your own medication and associated supplies during the visual inspection process.
Any medication and/or associated supplies that cannot be cleared visually must be submitted for X-ray screening. If you refuse, you will not be permitted to carry your medications and related supplies into the sterile area.