The Carry-On Only Packing List for a European City Break (That Actually Works)
No checked bags, no waiting at baggage reclaim, no airline fees. Here's exactly what fits in a carry-on for four days in a European city — and how to make it work.
The moment you commit to carry-on only, travel changes. No checking in luggage, no waiting at the belt, no €50 airline fee for the privilege of bringing your own stuff. You walk off the plane and straight out the door. It's one of the better travel decisions you can make.
We've done Lisbon, Budapest, Prague, Vienna, Seville and more with nothing but a carry-on. Here's exactly what goes in it.
Start with the right bag
The bag matters more than anything else on this list. You need something that fits Ryanair and Aer Lingus cabin bag dimensions (40x20x25cm for Ryanair, slightly more generous for Aer Lingus — check before you fly) while actually being usable.
A 20–25 litre backpack with a structured shape works better than a soft duffel — it holds its shape and fits in the overhead bin without a fight. Look for one with a laptop sleeve if you're travelling with one, and external pockets for things you need to access quickly at security.
Carry-on travel backpack on Amazon
Packing cubes — the one thing that makes this possible
Without packing cubes, carry-on travel means rummaging through a compressed mess every time you need a clean t-shirt. With them, your bag is organised, your clothes stay pressed (relatively), and you can find things without unpacking everything.
Get a set of three — one for tops, one for bottoms and layers, one for underwear and socks. Compression cubes let you pack slightly more than regular ones.
The clothing formula for four days
This works. We've tested it extensively.
- 3 t-shirts or tops (neutral colours that mix and match)
- 2 pairs of trousers or jeans (wear one on the plane)
- 1 smart layer — a linen shirt or light blazer that elevates an outfit for dinner
- 1 lightweight waterproof jacket (doubles as your warmest layer)
- 4 pairs of underwear and socks
- 1 pair of shoes on your feet, 1 pair packed (keep it to two)
The jacket is key. In a European city in spring or autumn, it's your rain cover, your evening layer, and your warmest item. One good jacket replaces three mediocre ones.
Lightweight packable jacket on Amazon
Toiletries — the security queue version
Everything liquid has to fit in a single 1-litre clear bag. The trick is decanting rather than bringing full-size products. Small reusable bottles for shampoo, conditioner, moisturiser — 50–100ml each is plenty for four days.
Reusable travel bottle set on Amazon — the silicone ones that don't leak are worth paying a bit more for.
Solid toiletries (shampoo bars, solid moisturiser, toothpaste tablets) are the carry-on traveller's secret weapon — no liquid rules, no spillage, and they last ages.
Tech essentials
- A compact universal adapter — European cities mostly use two-pin Schuko, but standards vary. One good universal adapter covers everything.
- A small power bank — city days are long and Google Maps drains a battery fast.
- Noise-cancelling earphones — for the flight and for blocking out the bar noise at 2am when you're trying to sleep in a city hotel.
Compact universal travel adapter on Amazon
The things that don't make the cut
A hairdryer — every hotel and Airbnb has one. A full-size towel — same. "Just in case" outfits — they never get worn and take up a third of your bag. Books — get a Kindle app on your phone. Snacks — you're going to a city with food.
The mindset shift
Carry-on only forces you to make decisions before you travel rather than at the destination. That's actually the point. You pack less, you think about what you actually need, and you end up wearing more of what you bring because you chose it deliberately.
It takes one trip to convert you. After that you'll never check a bag again.