BA’s standard cabin baggage allowance is one cabin bag measuring up to 56 × 45 × 25 cm and one smaller handbag or laptop bag measuring up to 40 × 30 × 15 cm. The limits include wheels, handles and external pockets, and each item must weigh no more than 23 kg. The larger bag goes in the overhead locker; the smaller one should fit under the seat in front of you. Check the allowance for your specific booking before packing, particularly if another airline operates part of your journey.
British Airways’ standard allowance covers two separate pieces of hand baggage: a larger cabin bag and a smaller personal item, often described as a handbag or laptop bag. The dimensions are different, so a bag that fits the smaller-item limit cannot be assumed to qualify as the main cabin bag, or vice versa.
| Item | Maximum dimensions | Maximum weight | Where it goes |
|---|---|---|---|
| Cabin bag | 56 × 45 × 25 cm (about 22 × 18 × 10 in) | 23 kg | Overhead locker |
| Handbag or laptop bag | 40 × 30 × 15 cm (about 16 × 12 × 6 in) | 23 kg | Under the seat in front |
These are maximum external measurements, not just the dimensions of the bag’s main compartment. A case advertised as “carry-on size” may still exceed BA’s limit once its wheels, handles or pockets are included. Likewise, a soft-sided bag can become too deep when it is packed full.
Measure the bag as you intend to take it to the airport. Put it on a flat surface and check its greatest height, width and depth, including anything that sticks out. Do not rely solely on the manufacturer’s product description: some listings give the dimensions of the bag body without every external feature.
Allow a little room below the maximum if you can. A bag that measures exactly at the limit when empty may become difficult to fit into an airport sizer after it has been packed. This matters especially for soft backpacks, which can change shape as contents shift.
Before travelling, look at the baggage details in your booking or use British Airways’ Manage My Booking service. Confirm both the size allowance and the number of cabin items permitted for your itinerary. Fare information about checked baggage is not a substitute for checking the cabin baggage allowance; the two refer to different baggage arrangements.
Pay particular attention to journeys involving a connection or a flight operated by another airline. A BA flight number does not always mean British Airways operates the aircraft. If a partner airline operates one or more legs, its hand baggage rules may differ. Check the operating carrier and the rules that apply to each flight rather than assuming that the BA cabin bag size applies throughout the journey.
Also check again if your booking changes. A new flight, carrier or itinerary may mean you need to confirm the baggage rules again. If the booking information and a general baggage page appear to differ, use the details for your actual flight and contact the airline before departure if anything remains unclear.
Meeting the size limit is only part of the test. The larger bag needs to go in the overhead locker, while the smaller item should fit under the seat in front of you. BA’s standard guidance also requires passengers to be able to lift their cabin bag into the overhead locker themselves. A bag can therefore be within the stated dimensions and weight limit yet still be awkward to manage if it is packed densely or has an uncomfortable shape.
If you are carrying a power bank or spare batteries, check the applicable airline and battery-safety rules before packing. If your cabin bag is taken from you for the hold at the gate, remove any items that must remain in the cabin, as well as documents, medication and valuables.
If a bag does not fit the permitted dimensions or exceeds the weight limit, it may not be accepted as cabin baggage. The airline may require it to travel in the hold instead. Whether that creates an extra charge can depend on your ticket’s baggage allowance and the circumstances, so do not assume that a bag will be checked at no cost.
A bag that meets the published limits may still be placed in the hold if cabin storage is restricted. Follow the crew’s or airport staff’s instructions, and prepare for this possibility by keeping essential items in your smaller personal bag. If you are asked to hand over your cabin case, remove items you need during the flight before it is taken away.
If you discover the problem before leaving home, repack or change to a smaller bag rather than relying on a last-minute exception. If you are already at the airport, ask British Airways staff what options apply to your booking before handing over baggage or paying for an additional service.
BA’s standard maximum for the main cabin bag is 56 × 45 × 25 cm, including wheels, handles and pockets. The smaller handbag or laptop bag has a maximum size of 40 × 30 × 15 cm.
Under BA’s standard allowance, you can take a cabin bag and a separate handbag or laptop bag. A suitcase may count as the cabin bag and a backpack may count as the smaller item, but each must meet the dimensions for its category and fit in the required storage space.
Yes. Measure the entire outside of the bag, including wheels, handles and external pockets. If you use an expandable case, check its size with the expansion section open if that is how you intend to travel.
BA’s standard cabin baggage guidance sets a maximum of 23 kg for each item. The smaller bag must still fit under the seat, and you must be able to lift the cabin bag into the overhead locker yourself.
Check the hand baggage rules for the operating airline as well as your BA booking details. The allowance may differ between carriers, so confirm the rules for each flight on your itinerary before packing.
For most travellers, the safest approach is to measure both bags fully packed, keep each within its own BA cabin bag size limit, and confirm the allowance against the actual flight in the booking. That small check before departure can prevent an unsuitable bag from becoming an airport problem.
