A lost suitcase, a missed connection, and an unexpected overnight stay in Japan taught me exactly what every traveler should keep in their carry-on bag. Here are the essentials I’ll never fly without again.
There are some travel lessons you learn from research.
And then there are the lessons you learn while standing at a baggage carousel in another country, watching every suitcase come out except your own.
Guess which kind this was.
My friend and I had just left Calgary for what was supposed to be the start of an unforgettable two-week girls’ trip to Vietnam. We had spent months planning every detail — flights, hotels, outfits, excursions, and of course, how much shopping we intended to do once we got there.
After plenty of deliberation, we decided to each bring one checked suitcase and one carry-on.
Was it a lot for a trip that involved bouncing between multiple cities?
Absolutely.
Did we know we wanted room for custom tailored clothes from Hoi An and a little market shopping?
Also absolutely.
So with our luggage checked, passports in hand, and vacation mode fully activated, we boarded our long flight to Japan feeling prepared.
Or so I thought.
My Suitcase Never Left Canada
When we landed in Japan, we made our way to the baggage carousel to collect our luggage before our connecting flight to Hanoi.
Bag after bag came out.
Mine did not.
At first, I stayed calm.
Then the conveyor belt started looking suspiciously empty.
Then it stopped.
Still no suitcase.
That was the exact moment my stomach dropped.
Thankfully, I had tucked an AirTag into my luggage before leaving home, so I quickly opened my phone to check.
There it was.
My suitcase was very comfortably still sitting in Calgary, Alberta.
Perfect.
I found an airline representative who confirmed that yes, my bag had missed the plane.
“No problem,” she said kindly, “we will send it to you in Japan.”
Which would have been excellent news if Japan had actually been my destination.
Unfortunately, Japan was simply the place I was supposed to be passing through on my way to Vietnam.
Cue the lost luggage paperwork, multiple conversations, thank you, Google translate, trying to explain international forwarding, and enough airport chaos that we missed our connecting flight to Hanoi completely.
So there we were:
unexpectedly stranded in Japan, no luggage, no hotel, no clue where to go, and very little knowledge of the country we were now stranded in.
Not exactly the glamorous international arrival I had pictured.
The One Thing That Saved Me? My Carry-On Bag.
As stressful as it all was, I learned one major travel lesson almost immediately:
Your carry-on is not just for snacks and a book.
Your carry-on is your backup survival suitcase.
Because if your checked luggage disappears — even temporarily — everything you packed in that small bag becomes very important, very quickly.
I had mildly prepared.
I had:
- a change of underclothing,
- compression socks,
- my toothbrush,
- toothpaste,
- and a small toiletries bag with a bottle of lotion, sanitizer, and some wipes
- my laptop, cellphone & noise cancelleing headphones
- peanuts in case I got hungry
- medication, but I left my prescription one in my luggage
At the time, I felt very organized.
Standing in Japan with no suitcase, I realized I was… moderately organized at best.
There were several things I was very thankful to have, and several things I now know I will never travel without again.
So if you are wondering what to pack in your carry-on luggage for an international trip, here is my real-life tested list.
What to Always Pack in Your Carry-On Luggage
1. A Full Change of Clothes
And I mean an actual outfit.
Not just underwear.
Fresh clothes after a long-haul flight are a gift. Fresh clothes when you are unexpectedly without luggage overnight are a necessity.
Pack:
- underwear
- socks
- lightweight top
- leggings/shorts/joggers
- bathing suit if heading somewhere warm
Trust me, airport chic becomes much less important than simply having something clean.
2. A Small Toiletries Bag
Nothing elaborate — just enough to make you feel human.
My essentials now:
- toothbrush
- toothpaste
- deodorant
- moisturizer
- face wipes
- lip balm
- hairbrush
- travel-size makeup basics
After delayed flights, airport air, and zero sleep, a clean face and brushed teeth can dramatically improve morale.
3. Prescription Medication (Plus the “Just in Case” Stuff)
Never, ever put anything important in checked luggage.
Prescription meds should always stay with you.
I would also add:
- Gravol/motion sickness meds
- Tylenol or Advil
- allergy medication
- band-aids
Travel has a funny way of becoming medically inconvenient at the worst times.
4. Chargers, Cords, and a Power Converter
This was one of the biggest lifesavers.
When your phone or laptop suddenly becomes your map, hotel booking service, airline customer support desk, translator, and source of emotional stability, keeping it charged matters.
Carry:
- phone charger
- laptop charger
- watch charger
- portable power bank
- international power converter
Thankfully my friend had her converter. I was borrowing it constantly.
5. Noise Cancelling Headphones
Long-haul flights.
Airport announcements.
Crying babies.
General travel chaos.
Enough said.
6. All Technology and Valuables
Never check:
- laptops
- cameras
- jewelry
- passports/visas/documents
- expensive electronics
If losing it would ruin your day, keep it with you.
7. Glasses and Sunglasses
This sounds obvious until you realize how many people toss these in a checked case “to keep them safe.”
Nope.
Daily essentials stay in the carry-on.
8. Reusable Water Bottle
Because one delayed flight can quickly become twelve hours of dry airplane air and overpriced airport bottled water.
Hydration matters far more than we give it credit for.
9. A Light Jacket or Sweater
One of the biggest mistakes travelers make is dressing only for the weather at their destination.
Vietnam was tropical.
Japan was not, it was quite cold.
Layers save you.
This Adidas rain jacket is light weight and compact
10. An Airplane Pillow and Sleep Mask
Long flights are tiring.
Airport delays make them even longer.
Trying to sleep upright with lights flashing on and off around you is not ideal.
A neck pillow and sleep mask make resting so much easier.
Comfort matters.
Carry-On Mistakes Travelers Often Make
Forgetting That Power Banks Must Stay With You
Airlines are becoming stricter and stricter with lithium batteries and portable chargers.
Most do not allow them in checked baggage at all due to fire risk, and many require them to remain in cabin luggage.
Do not bury them somewhere inaccessible.
We used this one and I recommend it, it comes complete with the USB cords
Bringing the Wrong Charging Cord
Modern phones may use USB-C, but many airplanes are still living in 2017.
A shocking number of seat charging stations still use standard USB ports.
Bring both options if possible.
Ignoring Carry-On Weight Restrictions
This is one many travelers don’t think about until they are standing at check-in frantically trying to rearrange shoes.
A lot of international airlines actually weigh carry-on luggage, and the allowance is often only around 7kg to 8kg.
If your bag is too heavy, they will check it.
And then all those carefully packed essentials are suddenly gone.
My Unexpected Overnight in Japan
Once we accepted that we were not making it to Vietnam that night, we did what every stranded traveler does:
took a deep breath, booked a hotel, and headed to the mall in Japan to buy me a few necessities.
Which, looking back, was actually a bit of an adventure in itself.
We rebooked ourselves through China the following day so we would only lose a portion of our trip, and thankfully Japan Airlines arranged to forward my suitcase to Hanoi once it finally arrived from Canada.
And somehow — against all odds — when we landed in Vietnam, my luggage was there waiting for me.
I have never loved a suitcase more.
At the time, it felt stressful, frustrating, and like a terrible way to start vacation.
Now it feels like one of those travel stories I will tell forever.
Mostly because it taught me this:
Never treat your carry-on like an afterthought.
Pack it like your trip depends on it.
Because sometimes… it does.
Quick Carry-On Packing Checklist for International Travel
✔ Full change of clothes
✔ Underwear and socks
✔ Bathing suit
✔ Toiletries pouch
✔ Prescription medication
✔ Motion sickness/pain medication
✔ Chargers and cords
✔ Power bank
✔ International power converter
✔ Laptop/technology
✔ Headphones
✔ Glasses/sunglasses
✔ Reusable water bottle
✔ Light sweater or jacket
✔ Passport, wallet, valuables
Travel rarely goes exactly as planned, and sometimes those unexpected moments become the stories we laugh about later.
Have you ever had a travel day go completely sideways? Share your experience in the comments below.
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