Flying with Insulin and Diabetes Supplies: The Complete Airport Survival Guide

I still remember my first flight after being diagnosed. I was sweating before I even got to security. Would they confiscate my insulin? Would the syringes set off alarms? Would I have to explain myself to five different people?

Fast forward a few hundred flights later, and I can tell you it’s almost never as bad as you fear. Almost. Here’s everything I’ve learned about flying with diabetes supplies.

The Golden Rule: Everything in Carry-On

Let me say this clearly: never put your insulin or diabetes supplies in checked luggage. Ever.

Why Checked Bags Are Dangerous

• Cargo holds freeze - Temperatures can drop below -40°F, destroying insulin
• Luggage gets lost - Mine has, multiple times
• No access during flight - Can’t get to supplies during a 14-hour flight if needed
• Delays happen - Your bag might arrive days after you do

I know it’s tempting to check that extra bag of supplies. Don’t do it. The peace of mind isn’t worth the risk.

What You Can Bring Through Security

The good news is that diabetes supplies are explicitly allowed through airport security worldwide.

Always Permitted Items

Key point: Medical liquid rules don’t apply to insulin. You can bring more than 3.4oz.

How to Pack Your Supplies

Here’s how I organize my carry-on after years of trial and error:

The “Quick Access” Bag

Keep a clear toiletry bag in an easy-to-reach pocket with:

• Doctor’s letter (more on this below)
• Insulin you’ll need during the flight
• Glucose meter and strips
• Fast-acting glucose (tabs or juice)
• Backup syringes or pen needles

This goes in an outer pocket so you can pull it out quickly if asked.

The Main Supply Bag

Everything else goes in a separate, organized bag:

• Extra insulin in insulated pouch
• Extra pods or pump supplies
• Backup syringes and pen needles
• CGM sensors and transmitters
• Batteries for all devices
• Spare infusion sets if applicable

I use a small insulated bag for the insulin and pack everything else around it.

The Doctor’s Letter

Do you absolutely need one? Technically, no. In my experience, I’ve been asked for documentation maybe 5% of the time. But that 5% is stressful enough that I always carry one.

What Your Letter Should Include

1. Your full name matching your ID
2. Diagnosis statement (Type 1 diabetes)
3. List of medications with generic and brand names
4. List of supplies you carry
5. Statement of medical necessity
6. Doctor’s signature and contact info
7. Date (keep it updated annually)

Get it on official letterhead. I keep a laminated copy in my bag and a photo on my phone as backup.

Getting Through Security: Region by Region

TSA (United States)

TSA is generally the easiest. They see diabetes supplies constantly.

My approach:

1. Put the quick-access bag in a bin by itself
2. Tell the agent “I have diabetes supplies and insulin”
3. They might swab it for explosives (normal, don’t worry)
4. That’s usually it

Pro tip: TSA PreCheck makes this even smoother. Worth the investment if you fly often.

International Airports

This is where it gets more variable.

I’ve had random issues in places I didn’t expect. Keep calm and be patient. Getting upset never helps.

Insulin Pumps and Body Scanners

If you wear a pump or CGM, you have options at security.

Your Screening Options

1. Walk through metal detector - Request this instead of body scanner. Pumps are fine through metal detectors.
2. Request pat-down - If no metal detector available, you can opt for manual screening.
3. Go through body scanner - Most modern pumps are approved, but check your device documentation.

Manufacturer guidance:

• Omnipod 5: Metal detector OK, body scanner OK (per manufacturer)
• Tandem: Metal detector OK, avoid body scanners
• Medtronic: Metal detector OK, consult documentation for body scanners
• Dexcom G6/G7: Generally OK through all screening

I personally walk through metal detectors when available and have had zero issues with my pump.

Managing During the Flight

Long flights present their own challenges.

Time Zone Adjustments

If you’re crossing multiple time zones, your basal rates might need adjusting.

I typically run slightly higher on travel days rather than risk lows while stuck in a metal tube at 35,000 feet.

In-Flight Tips

1. Check for bubbles - Cabin pressure changes can cause bubbles in pump tubing
2. Stay hydrated - Dehydration affects blood sugar
3. Carry backup snacks - Don’t rely solely on airline meals
4. Set phone reminders - Easy to lose track of time while watching movies
5. Tell flight attendants - They can help if you have a low

The Stress Factor

Here’s something nobody talks about: travel days just mess with your blood sugar. The stress, the schedule disruption, the sitting for hours, the airplane food. My numbers are always worse on travel days.

I’ve learned to accept this and not beat myself up about it. A day of slightly elevated blood sugar won’t kill you. Stressing about it makes everything worse.

Pre-Flight Checklist

Before every trip, I run through this:

• Doctor’s letter in quick-access bag
• Insulin in cooling pouch
• At least 2x the supplies I think I need
• Fast-acting glucose easily accessible
• Phone charged with medical info saved
• Travel insurance documents handy
• Backup meter and strips packed
• All devices fully charged

The Bottom Line

Flying with diabetes supplies is manageable once you’ve got a system. The first few times are nerve-wracking. By flight number fifty, it’s routine.

The real stress isn’t usually the airport security. It’s knowing you have enough supplies for your trip and your return. That’s where proper planning (or a reliable supply service) comes in.

Planning a long trip abroad? Join our waitlist and take the supply stress out of the equation.