What to Bring on a Plane: Personal Item Essentials Checklist

Most packing lists are about the suitcase. This one is about the bag you keep with you: the personal item under the seat in front, and whatever's in your pockets.

To write it, we read the biggest Reddit threads on the subject: r/travel's "What in-flight comfort items actually helped on a long-haul flight?" and "What are your travel essentials you always pack for international flights?", r/TravelHacks' "What is one item you will never travel without?", and r/onebag's "Airplane travel gear must have?", among others. That's a few thousand comments from people who fly a lot. The same handful of things kept coming up, and so did a few mistakes.

Short version: keep your meds, documents, phone charger, glasses or contacts and one change of clothes with you, never in a checked bag. For the flight itself, the things frequent flyers actually rate are compression socks, noise-cancelling headphones, an eye mask and earplugs, a warm layer, an empty water bottle, snacks, a pen and a few stomach meds. Liquids still follow the 100 ml (3.4 oz) rule at most airports, and power banks always stay in the cabin.

The "if my bag gets lost" kit

Start here, before any comfort stuff.

Bags do go missing, just not often. SITA, which tracks baggage for the airline industry, counted 4.9 mishandled bags per 1,000 passengers in 2025, and in its previous report about three quarters of mishandled bags were delayed rather than lost for good. So the realistic problem isn't "my bag is gone forever". It's "my bag turns up in two days". Pack your personal item for those two days.

• Medication, all of it. Prescriptions plus a few days extra, in case of delays. Take a photo of the label and the packaging too. It makes a replacement abroad much easier.
• Passport or ID and your boarding pass. A photo of your passport on your phone is a handy backup.
• Phone charger, a spare cable and a power bank. When your boarding pass, maps and bank cards all live on your phone, a dead cable is a big deal.
• Glasses, and spare contacts. In r/HerOneBag's "just in case" thread, the most upvoted answer was a spare pair of prescription glasses.
• One change of clothes. At least underwear, socks and a top. The top comment in r/TravelHacks' "underrated travel hack" thread (almost 700 upvotes) was a couple who pack half of each other's clothes in each other's bags, as full outfits, so a lost bag doesn't leave either of them with nothing.
• Anything valuable or fragile. Laptop, camera, jewelry, keys, the car key for the parking lot back home.

If your carry-on gets checked at the gate (it happens on full flights), pull these out first. Same goes for power banks, which can't go in the hold at all.

What actually helps on a long flight

Every "flight essentials" list online has thirty items. In the r/travel thread asking what actually helped on long-haul, the answers were short and repetitive, which is a good sign.

About compression socks

Several commenters said they only started wearing them after their feet swelled badly on a long flight, and wouldn't fly long-haul without them now. They help with swelling. On blood clots, medical advice is more cautious: guidelines generally recommend properly fitted stockings for travelers with a higher clot risk (older age, pregnancy, recent surgery, a past clot), not for everyone. If that's you, ask your doctor. Everyone should get up and walk every couple of hours.

About sleep: lower your expectations

The most upvoted reply in r/solotravel's "40 solo flights. Slept on 3 of them." thread was simply to accept that you won't sleep. Frequent flyers say the same thing in different ways:

• Aim for 3–4 hours, not 8. In economy, a few hours of real sleep is a win.
• Pick your arrival time. Several people book flights landing in the evening, then go straight to bed at the hotel. That does more for jet lag than any gadget.
• Brush your teeth before you try to sleep. One commenter uses it as a bedtime signal for their brain.
• Window or aisle? Window means you can lean and nobody climbs over you. Aisle means you can get up without waking anyone. Pick by your bladder.

People also talk about sleep aids and sedatives in these threads, a lot. If you want to try one, ask your doctor first, never try something for the first time on a plane, and don't take it until you've boarded. Commenters warn about strong antihistamines knocking them out so hard they could barely manage a tight connection, and about a delay leaving them groggy at the gate.

The small things that save the day

A pen. Seriously.

A pen was the top answer in r/onebag's "Airplane travel gear must have?" thread. Some countries still hand out paper arrival or customs cards on the plane, and the crew only has a few pens for the whole cabin. People describe whole arrival halls borrowing one pen.

How common is it in 2026? Australia still hands out paper Incoming Passenger Cards on most flights while it rolls out a digital version. Japan has an optional online form but paper cards are still around. Thailand went fully online with its Digital Arrival Card. So check your destination, but a pen weighs nothing. Bring a black or blue ballpoint.

A tiny stomach kit

The most upvoted answer in r/travel's "essentials you always pack for international flights" thread was Imodium, just in case. Replies included someone who had food poisoning for 13 hours of a 16-hour flight. A few anti-diarrhea tablets, something for heartburn and a painkiller take up no space.

Something for your ears on descent

If cabin pressure gives you ear or sinus pain, several commenters take a decongestant before take-off and before descent. Ask a pharmacist what's right for you. Chewing gum and yawning help a bit too.

What gets stopped at security

The fast way to lose things is to pack them in the wrong bag.

• Liquids: the classic rule is 100 ml (3.4 oz) per container, all in one clear bag of about 1 litre. Drinks, sunscreen, toothpaste, lotion, gels and sprays all count. Check your toiletries with the liquids checker.
• But it's changing in Europe. In 2026 many UK airports (including Heathrow and Gatwick) and some EU airports with new CT scanners allow containers up to 2 litres. Others still enforce 100 ml, and so does every US airport. Your flight home may be stricter than your flight out, so pack for the strictest airport on your trip.
• Medical exceptions: medically necessary liquids, baby formula and breast milk are allowed in larger amounts. Tell the officer at screening. For contact lens solution, take a travel-size bottle in your carry-on. TSA says some lens solutions set off its scanners and suggests putting bottles over 3.4 oz in your checked bag.
• Food: solid food is fine. Spreads, sauces, yogurt and anything you could pour count as liquids.
• Empty water bottle: fine. It has to be empty.
• Power banks and spare batteries: carry-on only, never checked. Many airlines also ban using them on board and putting them in the overhead bin. Details in our power bank guide.
• Sharp things and sprays: small scissors and nail clippers are usually fine, knives aren't. Pepper spray is a bad idea when flying internationally: one r/TravelHacks commenter was arrested at Hamburg Airport over a still-sealed can buried in their bag.

Will it all fit under the seat?

On a full-service airline, this kit plus a laptop fits easily in a normal backpack. On budget airlines it's tighter. A bag no bigger than 40 x 30 x 15 cm (15.7 x 11.8 x 5.9 in) fits the free personal item on every European airline we track, and 16.9 x 9.8 x 7.9 in (43 x 25 x 20 cm) fits every US airline that publishes a size. That's a soft backpack of roughly 15 to 20 litres, and depth is what usually fails at the sizer.

A tip from r/onebag: pack the things you'll want mid-flight (earbuds, lip balm, pen, glasses, snacks) in one small pouch and put it in the seat pocket. Then the big bag stays under the seat or in the bin for the whole flight.

Check your airline's size in the personal item size chart, or type your bag's measurements into the bag checker.

Things people bring and don't need

The same threads have plenty of "I always pack this and never use it":

• A multi-tool or knife. One r/travel commenter asked what anyone needs a multi-tool for on a flight. It won't get through security anyway.
• Too many gadgets. Laptop, tablet, e-reader and a game controller for a one-week trip got gently roasted in r/onebag.
• A neck pillow you hate. Opinions are split. Some people swear by the slim wrap-around kind, others say every neck pillow puts their neck at a weird angle. If yours doesn't work at home on the sofa, it won't work on the plane.

Checklists to copy

Short flight (under 3 hours)

• Phone, charger cable, power bank
• ID or passport, boarding pass
• Meds you'll need that day
• Empty water bottle
• Headphones
• A layer

Long-haul flight

• Everything on the short-flight list
• All your meds, plus a few days extra
• One change of clothes (at least underwear, socks, a top)
• Glasses or contacts, spare contacts
• Compression or warm socks
• Noise-cancelling headphones, plus a wired pair or adapter for the seat screen
• Eye mask and earplugs
• A hoodie or big scarf
• Snacks
• A pen
• A few stomach meds and a painkiller
• Toothbrush and small toothpaste
• Wipes, lip balm, moisturizer (in the liquids bag)
• Downloaded shows and offline maps

Want a list for the whole trip, not just the flight? The packing list maker builds one from your trip length, weather and laundry plans. And for the things people forget most, see the travel essentials people forget to pack.

Frequently asked questions

What should I always keep in my carry-on and never check?

Medication, passport or ID, keys, phone and charger, glasses or contacts, valuables like a laptop or jewelry, and power banks or spare batteries. Power banks aren't allowed in checked bags at all. A change of clothes is a good idea too, since most mishandled bags are delayed, not lost.

What helps most on a long-haul flight?

In Reddit's biggest threads on it, the answers that come up again and again are compression socks, noise-cancelling headphones, an eye mask and earplugs, a warm layer, water and snacks. And accepting that you probably won't sleep much in economy.

Can I bring an empty water bottle through airport security?

Yes. Empty bottles of any size are fine. Fill it at a water fountain or refill station after security.

Can I bring food on a plane?

Solid food like sandwiches, fruit, crackers and chocolate is fine through security. Things you could pour or spread, like yogurt, soup, hummus or jam, count as liquids. Some countries don't let you bring fresh fruit, meat or dairy in when you land, so eat it or bin it before arrival.

Do I need compression socks on a long flight?

Not everyone does, but they're the most recommended long-haul item on Reddit, mostly for swollen feet. Medical guidelines suggest them for travelers with a higher risk of blood clots. If you have a risk factor, ask your doctor. Everyone should get up and walk every couple of hours.

Why bring a pen on a plane?

Some countries, including Australia, still hand out paper arrival or customs cards on the plane, and the crew only has a few pens. Filling the form in on board saves you queueing for a pen when you land.

Is the 100 ml liquids rule still in force?

At most airports, yes, and at every US airport. Some UK and EU airports with new scanners now allow up to 2 litres, but it varies by airport and can change at short notice. Pack for the strictest airport on your trip, which is often the one on the way home.