Diabetes Travel Letter: Everything You Need to Know + Your Free Template to Download

Looking for the template directly?
Jump to the free download.
Or read on to understand exactly what to include and when you need it.

I've been stopped at airport security more times than I can count. Usually it's fine — a quick explanation, a glance at my cooling case, and I'm through.

But there was one trip in Indonesia, where the security officer spoke no English and I spoke no word of his language, where I genuinely didn't know how it was going to go.
I had insulin, needles, a pump, a CGM, and a USB mini fridge for my insulin. Without my diabetes travel letter, I still believe that could have been a very long and stressful conversation.
It wasn't. The letter handled it in thirty seconds.

Since then, I never travel internationally without one. And honestly, for longer domestic trips too, I carry it — not because I expect to need it, but because the one time you do need it, you really need it.

👉 For a complete breakdown of your rights at US airport security — including TSA rules for insulin, Ozempic, Mounjaro, needles, pumps, and CGMs — our guide on TSA Rules for Diabetic Travelers covers everything before you reach the checkpoint.

Do You Actually Need a Diabetes Travel Letter?

The honest answer: not always — but more often than you'd think.

For domestic US flights

The TSA does not require any documentation to travel with diabetic supplies.

Insulin, needles, syringes, pumps, CGMs — all are permitted in carry-on luggage without a letter. You have the right to carry everything you need without paperwork.

But "not required" and "not useful" are two different things.

TSA officers vary in their familiarity with diabetic supplies. A letter signed by your doctor doesn't just explain what you're carrying — it immediately signals that you're a prepared, informed patient, which tends to make the whole interaction faster and smoother.

For international travel

For international travel, a diabetes travel letter moves from useful to essential.

Every country has its own rules around importing medication. Most are straightforward for personal-use quantities of insulin and supplies — but having a letter from your doctor that clearly explains your condition and lists everything you're carrying removes any ambiguity at customs. In countries where English isn't the primary language, a translated version may also be worth the extra effort.

For in-flight situations

For in-flight situations — bringing your own fruit juice or snacks for hypoglycaemia, keeping a cooling case in the cabin, managing an injection mid-flight — a diabetes travel letter gives context that flight staff may ask for.

For medical emergencies abroad

Which none of us plan for but all of us should prepare for — a letter that clearly explains your condition, your medications, and your usual management approach can be genuinely critical when you're in an unfamiliar healthcare system and communication is difficult.

👉 Once your documentation is sorted, there's still the journey itself to prepare for. If you're flying, our guide on Flying with Insulin covers everything from getting through airport security with your supplies to keeping insulin cool in the cabin on a long-haul flight.

And if you're crossing multiple time zones, Managing Insulin Across Time Zones explains how to adjust your dosing schedule so your diabetes management stays on track from the moment you land.

When a Diabetes Travel Letter Really Matters

✅ At airport security with insulin pumps or CGMs. If you wear an insulin pump or CGM that can't go through certain scanners, a letter that specifically states this — and requests alternative screening — makes the conversation with security officers significantly easier. Without it, you're explaining from scratch every time.

✅ On international flights through multiple countries. Different countries have different rules, and a layover can mean two sets of customs and security in a single journey. A letter that's comprehensive and clearly written covers you for all of them.

✅ Traveling to countries with stricter medication importation rules. Most countries are fine with personal-use quantities of insulin, semaglutide, tizepatide, and diabetes supplies — but some have specific documentation requirements. A letter with your prescription details and your doctor's contact information covers both scenarios.

✅ When you need to source insulin or supplies abroad in an emergency. If your insulin is lost, stolen, or damaged and you need to visit a local pharmacy or hospital, a letter with your prescription details and usual insulin brand and dosage gives healthcare providers abroad the information they need to help you quickly.

✅ As a type 2 diabetic using GLP-1 medications. Ozempic, Mounjaro, Wegovy, Trulicity — these are injectable medications that look and travel similarly to insulin but are less universally recognised at security checkpoints. A letter explaining their medical necessity is particularly useful for GLP-1 users.

👉 If you're traveling with Ozempic, Mounjaro, Wegovy, or other injections alongside or instead of insulin, our guide on How to Travel with GLP-1 Medications cover the specific storage, security, and documentation considerations for each.

What to Include in a Diabetes Travel Letter

This is where the letter does its actual work — and where being thorough matters.

A vague diabetes travel letter is barely more useful than no letter.  A specific, well-structured letter signed by your doctor handles almost every situation you're likely to encounter.

Here's exactly what your diabetes travel letter should include:

• Your doctor's details

Full name, medical practice or hospital name, address, and direct contact number. This allows security officers or customs agents to verify the letter if needed, and gives foreign healthcare providers a point of contact in an emergency.

• Your personal details

Full name, date of birth, and passport or ID number — matching your travel documents exactly. This establishes that the letter and the traveler are the same person.

• Your diagnosis

A clear statement that you have insulin-dependent diabetes (type 1 or type 2, as applicable) and require the supplies listed below for your medical management. If you use GLP-1 medications, this section should also name the condition being treated.

• A comprehensive list of all medications and supplies

Be specific and be complete. This should include:

• • Insulin brand and type (e.g. Novolog rapid-acting insulin aspart, Lantus insulin glargine)
  • Insulin delivery devices — pens, vials, or pump
  • Insulin cooling case or mini fridge
  • Needles and syringes
  • Blood glucose meter, test strips, lancets, and spare batteries
  • Insulin pump model and supplies (infusion sets, reservoirs)
  • CGM model and sensors
  • Medical-grade insulin cooling case or travel refrigerator
  • Glucagon emergency kit
  • Fast-acting sugar for hypoglycaemia management (glucose tablets, juice)
  • Any other injectable medications (Ozempic, Mounjaro, etc.)

• A note about devices that require alternative security screening

If your insulin pump or CGM should not go through X-ray machines or full-body scanners, this needs to be stated explicitly — including the device name and model, and a request for a manual pat-down instead.

• A statement of medical necessity

A clear sentence from your doctor confirming that all listed items are medically necessary for your diabetes management and must travel with you at all times.

• Doctor's signature and date

The letter must be signed, dated, and ideally stamped with your doctor's practice stamp. An undated or unsigned letter carries significantly less weight.

👉 If you're traveling with a medical-grade insulin cooling case — which should absolutely be on your list — our guide on How I Keep My Insulin Cool When Traveling covers which cases work best for different types of trips, from day excursions to long-haul international flights.

Get Your Free Diabetes Travel Letter Template 

Rather than starting from scratch, 4AllFamily has created a free, ready-to-use diabetes travel letter template that you can download, print, and take straight to your next doctor's appointment.

The template is:

• Comprehensive — covers all the sections above, with space for your specific medications and devices
• Doctor-ready — formatted professionally so your GP or endocrinologist can fill it in and sign it in minutes
• Available digitally — save it to your phone and email so you always have access, even if you lose the printed copy

👇 Enter your email below to receive your free diabetes travel letter template instantly.

A great diabetes travel letter gets you through the checkpoint. A great insulin cooler gets your medication there safely.

A Few Tips for Using Your Travel Letter Effectively

Get it updated before every trip. A letter dated two years ago carries less weight than a current one. Make it part of your pre-travel preparation — book a GP appointment a few weeks before any international trip and get a fresh letter at the same time.

Carry both printed and digital copies. Printed for customs and security. Digital — saved to your phone and emailed to yourself — as a backup in case the printed copy is lost or damaged.

If traveling internationally, consider a translated version. For non-English-speaking destinations, a translation of your letter into the local language is worth the effort. Many diabetes travel letter services offer translated versions, or your GP's office may be able to help.

Include your travel insurer's contact details. If you're traveling with diabetes travel insurance — which you should be — adding the insurer's emergency contact number to the letter means it's all in one place if you need medical help abroad.

Keep it accessible, not buried. Your travel letter should be in the same place as your passport — not at the bottom of your checked bag. If you need it, you need it quickly.

👉 Speaking of travel insurance — for diabetics, not just any policy will do. Our guide on Travel Insurance for Diabetes covers what to look for, what to avoid, and how to make sure you're genuinely covered before you leave.

FAQs About Diabetes Travel Letters

Do I need a diabetes travel letter for domestic US flights? No — TSA does not require any documentation to travel with insulin, needles, or diabetes supplies on domestic US flights. However, carrying a letter can speed up security interactions, particularly if you wear an insulin pump or CGM that requires alternative screening.

Does a diabetes travel letter need to be translated for international travel? Not always, but it's strongly recommended for non-English-speaking destinations. A letter in the local language removes any ambiguity at customs or foreign security checkpoints and can make a significant difference if you need emergency medical help abroad where communication is difficult.

How long before my trip should I get my diabetes travel letter? At least two to three weeks before departure. This gives you time to book a doctor's appointment, get the letter completed and signed, and arrange a translation if needed. Last-minute letters are harder to get right and may be missing important details.

Does a diabetes travel letter expire? There's no official expiry, but a letter dated more than six to twelve months ago carries less weight than a current one. It's good practice to get an updated letter before every international trip, or any trip where you've changed your medications or devices since the last one.

Can I use the same diabetes travel letter for multiple trips? Yes, as long as your medications, devices, and personal details haven't changed and the letter is reasonably recent. If you've switched insulin brands, added a new device, or your passport number has changed, you'll need an updated version.

Does a diabetes travel letter cover GLP-1 medications like Ozempic or Mounjaro? Yes — your travel letter should list all injectable medications you're carrying, including GLP-1s. These medications are less universally recognised at security checkpoints than insulin, making a letter that explicitly names them and states their medical necessity particularly useful.

What if I lose my diabetes travel letter while traveling? This is exactly why keeping a digital copy on your phone and emailing it to yourself matters. If you lose the printed version, you can access the digital copy immediately. Some people also share a copy with a travel companion as an additional backup.

Does a diabetes travel letter help if I need to buy insulin abroad in an emergency? Yes — a letter that includes your insulin brand, type, and dosage, along with your doctor's contact details, gives foreign pharmacists and healthcare providers the information they need to help you quickly. It's particularly useful in countries where your specific insulin brand may not be available under the same name.

Can my GP write a diabetes travel letter or does it need to be a specialist? Either is fine. A letter from your GP, endocrinologist, or diabetes nurse practitioner carries equal weight at security and customs. What matters is that it's on official headed paper, clearly signed, dated, and includes all the necessary details.

Is a TSA notification card the same as a diabetes travel letter? No — they serve different purposes. A TSA notification card is a small card you can show discreetly to security officers to inform them of your medical condition before screening. A diabetes travel letter is a comprehensive document from your doctor that lists all your medications and supplies. Both are useful and complement each other — the card for quick, discreet communication at the checkpoint, the letter for more detailed situations like customs or medical emergencies.

💬 We’d Love to Hear From You

Have you ever had a situation at airport security or customs where a diabetes travel letter made the difference — or where you wished you'd had one? Share it in the comments below. These real-world experiences are exactly what helps other diabetic travelers know what to prepare for.

And if you have questions about the template — what to ask your doctor to include, how to adapt it for a specific destination, or anything else — drop them below. We read every comment.