Traveling with Diabetes: What to Know
Travel Takes a Little Extra Planning, Not a Lot of Worry
Traveling with diabetes, whether it’s a short weekend trip or an international vacation, involves some extra preparation, but it doesn’t have to be stressful. Knowing the current airport security rules, packing the right supplies in the right place, and having a plan for time zone changes and unexpected delays covers the vast majority of what can go wrong. This page walks through what to know before your next trip.
TSA Rules for Insulin, CGMs, and Pumps
Insulin and injectable diabetes medications are always allowed in carry-on luggage.
This includes vials, pens, and prefilled syringes, and there’s no limit on quantity, even though standard TSA rules otherwise cap liquids at 3.4 ounces per container. Insulin should never go in checked luggage, since the cargo hold can reach temperature extremes that damage it, and a lost or delayed checked bag would leave you without your supplies entirely.
You’re not required to remove or disconnect an insulin pump or CGM to go through security.
You have the right to wear these devices through the checkpoint. That said, most manufacturers don’t guarantee their devices will continue functioning correctly if put through an airport body scanner, and some specifically advise against it. Many patients choose to request a pat-down instead of walking through the scanner while wearing a pump or CGM, or, for a tubed pump, to briefly disconnect the device and send it through the X-ray machine separately rather than the scanner. Check your specific device manufacturer’s current recommendation before you travel, since guidance can vary by model.
Tell the officer before screening begins.
A simple, direct statement works well: mention that you have diabetes and are carrying medical supplies, including insulin, and if applicable, a pump or CGM, and that you’d like a hand inspection of liquids and a pat-down for your devices if needed. This single sentence typically resolves any confusion quickly and directs you to the right screening lane.
Other supplies are permitted too.
Syringes, lancets, glucose meters, test strips, alcohol swabs, control solution, and glucagon in its original prescription-labeled packaging are all allowed through security. Fast-acting sugar sources for treating a low, including glucose tablets, gel, hard candy, or juice, are also permitted, even in liquid or gel form beyond the standard 3.4-ounce limit, since they’re treated as medically necessary.
If you run into a problem, ask for a supervisor.
Individual officer familiarity with these rules can vary. If you feel a rule isn’t being applied correctly, you can calmly ask to speak with a TSA supervisor, and you can also contact TSA Cares in advance of your trip if you’d like a passenger support specialist to meet you at the checkpoint.
Packing Your Supplies
Everything goes in your carry-on, not checked luggage.
Beyond the insulin temperature concern, keeping all your diabetes supplies with you means you’re never separated from what you need, even if your checked bag is delayed or lost.
Split your supplies between your carry-on and a personal item.
If you’re required to unexpectedly check your carry-on bag at the gate, or become separated from it for any reason, having a day or two’s worth of supplies in a smaller personal bag, like a backpack or purse, means you’re not left without anything.
Pack roughly twice what you expect to need.
This accounts for a pump site failure, a CGM sensor falling off early, unexpectedly using more insulin than planned, or any other unexpected situation. If you think you’ll need two infusion sets for the trip, pack four.
Keep pharmacy labels visible on all medications and supplies.
This isn’t strictly required by TSA, but it speeds up the screening process and helps confirm everything is legitimately prescribed.
Bring a doctor’s letter, especially for international travel.
Airport security and customs rules vary by country, and some are stricter about syringes and injectable medications than the United States. A letter from your doctor explaining your condition and supply needs can prevent issues at a foreign checkpoint.
Bring a small travel sharps container.
For used lancets or needles during a multi-day trip, having a dedicated container is safer and more practical than trying to manage disposal in a hotel room without one.
Managing Your Diabetes During the Trip
Altitude can affect glucose readings.
Higher altitudes are associated with slightly lower blood glucose meter readings, generally in the range of one to two percent lower per thousand feet of elevation gain, due to reduced oxygen pressure. This is a minor effect but worth being aware of if your readings seem slightly off during a flight or a trip to a high-elevation destination.
Set a CGM alarm during long flights, especially across time zones.
Jet lag and disrupted sleep can make it easier to miss the usual symptoms of a low, so an alarm adds a layer of protection when you might not be as alert to warning signs.
Let a flight attendant know you have diabetes.
A brief heads-up that you might need assistance if your blood sugar drops takes only a moment and means the crew is prepared to help if needed.
Stay hydrated and move periodically.
Walking the aisle every hour or so on a flight, or stopping regularly during a road trip, helps circulation and is a standard recommendation for any traveler, with added relevance for diabetic patients managing broader vascular health.
Adjust your schedule thoughtfully, not automatically.
Meal timing on flights or during travel often doesn’t match your usual routine. Eat and dose based on your actual blood sugar and meal timing rather than rigidly following airline food service schedules.
Planning for Supply Emergencies
Before you leave, it’s worth having a plan in case you lose supplies or run low unexpectedly. Ask your home pharmacy whether they can transfer a prescription to a pharmacy near your destination if needed, and know your insulin pump manufacturer’s process for an emergency loaner or replacement device while traveling, since many manufacturers offer some form of support for exactly this situation.
Keeping Your Supply Routine on Track While You Travel
If an upcoming trip has you thinking about whether your current supply and refill schedule will hold up, particularly for CGM sensors, pump supplies, or test strips, it’s worth reaching out before you leave rather than after you’re already on the road. Our support team can help adjust your refill timing so you have enough supply on hand for your trip, without over- or under-ordering.
Frequently Asked Questions
Yes. TSA allows insulin in any form, vials, pens, or prefilled syringes, in unlimited quantities in carry-on luggage, exempt from the standard 3.4-ounce liquid limit.
No, you’re not required to remove these devices to pass through the checkpoint. However, manufacturers often don’t guarantee device function after a body scanner, so many patients request a pat-down instead.
No. All diabetes supplies should stay in your carry-on, both because checked baggage can reach damaging temperatures and because a lost or delayed bag would leave you without supplies.
A common guideline is roughly double what you expect to need, accounting for pump site failures, early CGM sensor detachment, or using more insulin than planned.
Slightly. Higher altitude is associated with modestly lower blood glucose meter readings due to reduced oxygen pressure, generally a small effect worth being aware of rather than a major concern.
Contact your home pharmacy in advance to ask about transferring a prescription to a pharmacy near your destination, and check with your pump manufacturer about emergency loaner or replacement options before you travel.
This page provides general educational information and is not a substitute for medical advice or current official guidance. Confirm current rules directly with TSA or your destination’s relevant authority before traveling, particularly for international trips.