Every year, millions of passengers across Europe pay unnecessary baggage fees not because they packed too much, but because they had the wrong bag or did not know the current rules.
The difference between “boarded for free” and “paid €70 at the gate” often comes down to a few centimetres or 300 grams of excess weight.
This guide covers the rules of 20+ European airlines, explains the technical specifications that actually matter when choosing a backpack, and gives you a practical system for packing 5 days without checking any luggage.
Before looking at size charts, you need to understand exactly what gets checked at the gate. European airlines distinguish between three categories.
A small bag that fits under the seat in front of you. Included for free in the base fare on most airlines, including budget carriers.
Typical dimensions: 40×30×20 cm.
This is the size enforced most strictly, because it determines whether the bag fits under the seat.
A small suitcase, larger bag, or backpack for the overhead locker. On full-service airlines (Lufthansa, British Airways, Air France) it is included in the ticket price.
On low-cost carriers (Ryanair, Wizz Air) it requires Priority Boarding or a separate fee.
Typical dimensions: 55×40×20–23 cm.
A paid option or higher fare tier that allows you to take a cabin bag into the overhead locker without extra charge.
On Ryanair this means that in addition to a 40×30×20 cm backpack, you can bring a second bag of 55×40×20 cm.
Key rule: on budget airlines without Priority you are entitled to one bag under the seat. If you board with a backpack and an additional bag — one will be taken from you, and it will cost more than Priority purchased in advance.
Dimensions include handles and external pockets. The Enforcement column shows how strictly each airline checks the rules in practice.
| Airline | Personal Item (free) | Cabin Bag (Priority/fee) | Cabin Bag Weight | Enforcement |
|---|---|---|---|---|
| Ryanair | 40×30×20 cm | 55×40×20 cm | 10 kg | Strictest. Sizer frame at gate. |
| Lauda Europe | 40×30×20 cm | 55×40×20 cm | 10 kg | Ryanair subsidiary. Identical rules and frame. |
| Wizz Air | 40×30×20 cm | 55×40×23 cm | 10 kg | Strict. Frame and weighing. |
| easyJet | 45×36×20 cm | 56×45×25 cm | No limit* | More flexible than Ryanair, occasional frame. |
| Vueling | 40×20×30 cm | 55×40×20 cm | 10 kg | Strict on size, lenient on weight. |
| Transavia | 45×40×25 cm | 55×40×25 cm | 10 kg | Often weigh bags. |
| Jet2 | Up to 40×30×15 cm | 56×45×25 cm | 10 kg | Generous cabin bag, rarely strict. |
*easyJet: no official weight limit, but you must be able to lift the bag yourself.
| Airline | Cabin Bag | Weight | Enforcement |
|---|---|---|---|
| TUI fly | 55×40×20 cm | 10 kg | Rarely check weight. |
| Corendon | 55×40×20 cm | 8 kg | Dimensions matter more than weight. |
| SunExpress | 55×40×20 cm | 8 kg | Lenient with soft bags. |
| Pegasus | 55×40×20 cm | 8 kg | Rarely weigh. |
| Windrose | 55×35×15 cm | 5 kg | Small depth limit and low weight — watch out. |
| Airline | Personal Item | Cabin Bag (included in ticket) | Weight | Enforcement |
|---|---|---|---|---|
| Lufthansa | 40×30×10 cm | 55×40×23 cm | 8 kg | Strict on weight, flexible on shape. |
| Austrian Airlines | 40×30×10 cm | 55×40×23 cm | 8 kg | Same as Lufthansa. |
| Swiss (SWISS) | 40×30×10 cm | 55×40×23 cm | 8 kg | Same as Lufthansa. |
| Eurowings | 40×30×25 cm | 55×40×23 cm | 8 kg | Relatively lenient. |
| Air France | 40×30×15 cm | 55×35×25 cm | 12 kg (combined) | Visual check, rarely weigh. |
| KLM | 40×30×15 cm | 55×35×25 cm | 12 kg (combined) | Nearly identical to Air France. |
| Iberia | 40×30×15 cm | 56×40×25 cm | 10 kg | Moderate enforcement, large cabin bag. |
| ITA Airways | 40×30×15 cm | 55×35×25 cm | 8 kg | Similar to Air France/KLM. |
| British Airways | 40×30×15 cm | 56×45×25 cm | 23 kg | Most generous weight limit in Europe. |
| SAS | 40×30×15 cm | 55×40×23 cm | 8 kg | Lenient with soft bags. |
| Turkish Airlines | Up to 40×30×15 cm | 55×40×23 cm | 8 kg | Rarely weigh, strict on dimensions. |
| Norwegian | 25×33×20 cm | 55×40×23 cm | 10 kg | Small personal item — watch out. |
Important: airline rules change — sometimes several times a year. Always check current information on your carrier's official website 24–48 hours before departure.
Both airlines use physical sizer frames at the gate. If your backpack doesn’t fit — on-the-spot check-in costs from €45 to €80 depending on the route and when you pay. Always more expensive than Priority bought in advance. See Ryanair backpacks and Wizz Air backpacks.
One critical point: dimensions matter more than volume in litres. A 20-litre backpack with a wide, rigid frame may fail the sizer, while a slim 25-litre soft pack sails through. Soft materials have another advantage: if the bag is borderline — it compresses slightly in the frame where a rigid construction won’t give a single millimetre.
A separate note on Ryanair: in August 2025 the airline updated the free personal item dimensions from 40×20×25 cm to 40×30×20 cm. If you see the old size on third-party websites — that information is out of date.
45×36×20 cm is the largest free personal item allowance among major low-cost carriers in Europe. Browse easyJet backpacks.
The airline almost never weighs bags, but still enforces dimensions. Depth matters more than capacity claims.
12 kg is the combined limit for your cabin bag and personal item together. In practice checks are usually visual.
A soft backpack with a neat profile attracts less attention than a bulky textile tote even if they are exactly the same size.
Lufthansa is among the airlines that genuinely weigh bags at check-in and at the gate.
With an 8 kg limit, the empty weight of your backpack becomes a critical parameter. A backpack that weighs 1.2–1.4 kg empty gives you meaningfully more payload than a model that weighs 2 kg.
56×45×25 cm and 23 kg is effectively small-suitcase territory. On BA flights, a 35-litre backpack can be a genuine carry-on solution.
Norwegian has an unusually small free personal item — just 25×33×20 cm. That is smaller than most competitors.
A proper carry-on backpack on Norwegian requires an upgrade or a higher fare.
Before looking at size charts, you need to understand exactly what gets checked at the gate. European airlines distinguish between three categories.
Instead of packing “just in case” — choose a base palette of 2–3 colours that mix and match. 5 items give 10+ outfit combinations. A concrete list for 4–5 days in 22 litres:
Vacuum compression organisers — whether built into the backpack or purchased separately — reduce clothing volume by 50% without increasing the external dimensions of the bag.
The principle is simple: lay clothes in, close the zip, and release the air. This system turns “there’s no way a week fits in there” into “there’s still room to spare”.
Your jacket, a warm jumper, your heaviest pair of shoes — all worn at boarding.
Technically, clothing on your body doesn’t count as baggage and doesn’t affect the weight of your backpack.
Laptop and chargers go in the compartment closest to your back. Shoes if you’re packing them — at the bottom. Clothes in the middle — roll them (rolling instead of folding saves space).
Toiletry bag and documents at the top for quick access at security. This weight distribution reduces shoulder strain during long walks.
All liquids in containers of up to 100 ml each, in a clear zip-lock bag of no more than 1 litre — one bag per person. Solid shampoo, solid soap and toothpaste tablets bypass this rule entirely and free up space in the bag for something useful.
Up to 100 Wh — carry-on without question. 100–160 Wh — permitted, but the airline may ask you to take it out for inspection. Over 160 Wh — banned on most airlines. Power banks must never be checked into the hold.
Priorities: compact size, comfortable to walk with, qualifies as a personal item on Ryanair or easyJet without additional fees.
20–25 litres is enough with vacuum organisers. easyJet has the largest free personal item among budget carriers — 45×36×20 cm.
Priorities: quick access to documents and laptop, a backpack that looks at home in an office environment, passes security without unpacking.
Optimal volume: 20–25 litres. Lufthansa and Eurowings give the most freedom — 55×40×23 cm cabin bag included in the ticket.
Priorities: maximum volume within cabin bag limits, 180° opening for convenient packing, luggage pass-through if you have other bags.
Volume 30–35 litres, dimensions within 55×40×20–23 cm. Lufthansa, British Airways, or Eurowings give the most room.
A carry-on backpack is not a restriction — it is a way to travel light, safe, and without unnecessary costs. The key is knowing your airline’s rules and choosing a model that matches both the dimensions and your personal needs. Check the current requirements before every trip — it is the best way to avoid unpleasant surprises at the gate.
Carry-on collection
A carry-on backpack is not a restriction — it is a faster, safer and more flexible way to move through airports when you know your airline and pack with intent.
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