Last updated: August 2026
Looking for the best carry on bag for British Airways? Every passenger gets a free 56×45×25cm cabin bag and a free 40×30×15cm personal item, on every fare including the cheapest Basic ticket, so choosing the right one is worth the ten minutes it takes.
How we chose these bags
We’ve researched the market across both allowances and picked five bags that fit the sizer, pack well and won’t let you down at the gate. Three cover the 56cm cabin bag, and two are built for the slimmer 40×30×15cm personal item, which is 5cm shallower than the equivalent bag you’d use on our Jet2 cabin bag guide. So don’t assume last year’s under-seat bag will still fit.
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Flight Knight 56×45×25cm 4-Wheel ABS Hard Shell
Best overall, 4.3★ · 6,400+ reviews
The Flight Knight is the most reviewed 56×45×25cm hard case at this price point, with over 6,400 ratings. It holds 52 litres, weighs 3kg, and sits within BA’s cabin bag limit. Its own listing names British Airways directly as one of the airlines it’s built to fit. The ABS hard shell is scratch-resistant and water-resistant, four spinner wheels give full 360-degree movement, and there’s a combination padlock included. Flight Knight backs it with a five-year warranty, rare at this price. Available in a wide range of colours, and if you want the safest, best-tested option, this is it.
Aerolite 56×45×25cm 2-Wheel Softshell
Most packing space, 4.4★ · 1,200+ reviews
If packing capacity is your priority, the Aerolite is worth the extra. At 60 litres, it holds 8 litres more than the Flight Knight despite being lighter at 2.6kg, and the softshell gives a little when overstuffed. The two rollerblade wheels run smoothly and the telescopic aluminium handle extends to a metre. There’s a front zip pocket, the interior is lined with fabric made from recycled plastic bottles, and a TSA-approved lock is built in. Its listing is sized for the 56×45×25cm allowance shared by British Airways, Jet2 and easyJet, the best pick to maximise what you take on board.
ATX Luggage 56×45×25cm 4-Wheel
Best value, 4.4★ · 3,000+ reviews
The ATX is the budget pick here, and it earns that spot on price. At £36.54 it undercuts both the Flight Knight and the Aerolite by some margin, while still offering a hard ABS shell, four spinner wheels and a 57-litre capacity within BA’s 56×45×25cm limit. It has a built-in combination lock and a one-year warranty, and its 3,000-plus reviews are a solid sample for a case at this price. If you want a proper wheeled hard case for occasional trips and don’t need the extra polish of the pricier options, this is the one to look at.
BAGZY 40×30×15cm Underseat Backpack
Best overall, 4.5★ · 446 reviews
For the personal item slot, the BAGZY is built specifically to BA’s 40×30×15cm limit and carries the highest rating of any bag in this guide. It holds 20 litres and weighs about half a kilo empty. Inside there’s a padded 14-inch laptop sleeve, two front zip pockets, two side pockets for a bottle or umbrella, and a concealed anti-theft pocket on the back. The 800D nylon is genuinely water-resistant rather than just water-repellent, according to reviewers who’ve used it in the rain, and it works as a standalone bag or as the second item alongside the three cases above.
SUCIKORIO 40×30×15cm Underseat Backpack
Most reviewed, 4.3★ · 541 reviews
The SUCIKORIO has more reviews than any other personal item bag in this guide, with over 500 buyers rating it 4.3 stars. It measures exactly 40×30×15cm and holds the same 20 litres as the BAGZY. It has seven pockets including a 14-inch laptop compartment, a rear anti-theft pocket and two side pockets, all in waterproof, tear-resistant nylon. The breathable mesh straps and foam padding make it comfortable over longer walks through big airports like Heathrow, a safe, well-tested alternative if you want the reassurance of a bigger review count.
The best carry on bag for British Airways: our verdict
Which cabin bag to buy
For most passengers, the Flight Knight 4-Wheel Hard Shell is the safest choice for the 56×45×25cm cabin bag: 6,400+ reviews and a five-year warranty. If you want more capacity and don’t mind paying a little more, the Aerolite Softshell gives you 60 litres in a lighter bag. If you’re watching your budget, the ATX does the job for around £20.
Which personal item to buy
For the personal item, the BAGZY is the best-rated option built specifically to BA’s 40×30×15cm limit. If you’d rather buy the bag more people have already tested, the SUCIKORIO does the same job with the bigger review count. Once you’ve got the bag sorted, our guide to flying with British Airways covers everything else, from check-in to seat selection, and our British Airways sale dates guide is worth a look if you haven’t booked the flight yet.
“Every British Airways fare gets exactly the same cabin allowance, from the cheapest Basic ticket to the most expensive one on the route. That’s the bit worth remembering before you pay extra for a higher fare hoping for more luggage room, because you won’t get it. Spend that money on a case that earns its keep instead, one with decent wheels and a lock, not a fare upgrade that buys you nothing extra to carry.”
Kate Acaster, Chief Editor, Flight Tribe
Packing tips for British Airways
- Roll, don’t fold. Rolling compresses clothes better than folding and cuts down on creasing.
- Use packing cubes. Two or three cubes keep a 56×45×25cm case organised and stop soft bags bulging past the limit.
- Keep your personal item slim. It has to slide under the seat in front, not the locker, so avoid overstuffing it.
- Weigh your cabin bag at home if it’s heavy. There’s no published limit, but you must be able to lift it into the locker unaided.
- Check your aircraft type on CityFlyer routes. Smaller Embraer 190s have tighter lockers, so a compliant bag can still get gate-checked for free if the locker fills up.
| Product | Dimensions | Weight | Capacity | Approx price | Best For |
|---|---|---|---|---|---|
| Flight Knight | 56×45×25cm | 3.0kg | 52L | £40 | Best overall Cabin bag |
| Aerolite | 56×45×25cm | 2.6kg | 60L | £50 | Most packing space Cabin bag |
| ATX Luggage | 56×45×25cm | 1.8kg | 63L | £20 | Best value Cabin bag |
| BAGZY | 40×30×15cm | 0.5kg | 20L | £20 | Best overall Personal item |
| SUCIKORIO | 40×30×15cm | 0.6kg | 20L | £20 | Most reviewed Personal item |
British Airways’ cabin bag allowance explained
British Airways allows every passenger two bags into the cabin, on every fare, including Basic. The main cabin bag can be up to 56×45×25cm and goes in the overhead locker. The second bag is a personal item, up to 40×30×15cm, and it goes under the seat in front of you. Our full British Airways hand luggage size guide covers every fare and cabin class in more detail.
| Bag | Max size | Cost |
|---|---|---|
| Cabin bag | 56×45×25cm | Free Included |
| Personal item | 40×30×15cm | Free Included |
What about weight limits?
There’s no published weight limit for either bag. Instead, BA’s rule is that you must lift your own cabin bag into the overhead locker unaided. In practice, a heavy bag is more likely to cause a problem at the gate than a set of scales would. It’s a genuinely different approach to Ryanair or Wizz Air, both of which weigh and charge for cabin bags on standard fares, and it’s worth checking how BA compares with the market on our UK airline hand luggage comparison. See the official British Airways baggage policy for full details.
Watch out for BA CityFlyer routes
Here’s something worth knowing before you buy: BA CityFlyer routes, including services from London City, often use smaller Embraer 190 aircraft with tighter overhead lockers than the mainline fleet. A bag that’s well within BA’s official 56×45×25cm limit can still get gate-checked on these routes if the locker is full, though BA does this free of charge rather than billing you like a budget airline would. All dimensions include handles, wheels and external pockets, and every bag in this guide fits within BA’s official measurements.
| Section | Picks | Size |
|---|---|---|
| Cabin bag | 3 options above | 56×45×25cm |
| Personal item | 2 options above | 40×30×15cm |
Frequently asked questions
What size is British Airways’ cabin bag?
British Airways allows one cabin bag up to 56×45×25cm for the overhead locker and one personal item up to 40×30×15cm for under the seat. Both are free on every fare, including Basic.
Does British Airways weigh cabin bags?
No. British Airways doesn’t publish a cabin bag weight limit. The rule is that you must be able to lift your own bag into the overhead locker unassisted.
Can I take two bags on British Airways?
Yes. Every passenger can bring one 56×45×25cm cabin bag and one 40×30×15cm personal item, on every fare type, with no priority boarding needed.
Do I need to pay extra for a cabin bag on British Airways?
No. Unlike Ryanair or Wizz Air, British Airways includes both the cabin bag and the personal item free on all fares, including the cheapest Basic tickets.
Kate Acaster is Chief Editor at Flight Tribe. She writes about practical travel planning, budget airlines, baggage rules, city breaks, beach holidays and good hotels that do not cost daft money.
Kate has travelled through Europe, South America and beyond, usually with a notebook, a half-formed plan and a strong opinion on airport snacks. At Flight Tribe, her work focuses on helping UK travellers understand what is included, what costs extra, and whether a trip is worth booking at the price shown.
How Kate works
Kate checks the details that can change the value of a trip, including cabin-bag rules, airline fees, hotel location, seasonality, travel dates and booking conditions. She is especially interested in offers that look useful on the surface but need a proper reader-first check before they are worth recommending.
Editorial standards
Flight Tribe covers deals and travel advice for readers first. Affiliate links do not decide whether an offer is worth writing about.
