British Airways Carry-On Baggage Allowance: Size, Weight Limits
and Cabin Bag Rules (2026)
British Airways includes one free cabin bag and one personal item on all fares, including Economy Basic. The cabin bag can measure up to 56 x 45 x 25 cm,<
while the personal item can be up to 40 x 30 x 15 cm.Each item can weigh up to 23 kg, but you must be able to
lift your cabin bag into the overhead locker without assistance.
British Airways Carry-On: Quick Facts
| Item | Details |
| Cabin bag size | 56 x 45 x 25 cm (22 x 18 x 10 in) including handles and wheels |
| Personal item size | 40 x 30 x 15 cm (16 x 12 x 6 in) |
| Weight limit | Up to 23 kg per item, as long as you can lift your cabin bag into the overhead locker yourself |
| Cost | Free on all fares |
| Who qualifies | Every passenger including Economy Basic |
| Personal item goes | Under the seat in front of you |
| Cabin bag goes | Overhead locker |
| Same rules on BA CityFlyer and BA Euroflyer | Yes |
What Is the British Airways Carry-On Baggage Allowance?
British Airways gives every passenger one cabin bag up to 56 x 45 x 25 cm and one personal item up to 40 x 30 x 15 cm, free on every fare.Each item can weigh up to 23 kg, but your cabin bag must be light enough for you to lift it into the overhead locker without help.
What Is the British Airways Personal Item Size Limit?
The personal item on British Airways can measure up to 40 x 30 x 15 cm and must fit under the seat in front of you. This covers small backpacks, laptop bags, handbags, and similar items.
Keep medication, electronics, batteries, and travel documents in your personal item since larger cabin bags may occasionally be moved to the hold on busy flights.
One thing to watch: BA’s personal item depth of 15 cm is shallower than what most UK airlines allow, so a standard laptop backpack that fits under the seat on easyJet or Jet2 may technically exceed BA’s limit. The rule is not always enforced at the gate, but it is worth measuring before you travel.
Does British Airways Weigh Carry-On Bags?
British Airways will rarely weigh your carry-on at check-in or the gate, but staff can weigh it if your bag looks heavy or oversized. The combined limit for your cabin bag and personal item together is 23 kg.
You must be able to lift your bag into the overhead locker without assistance. If you struggle to do so, staff may intervene.
How Strict Is British Airways About Carry-On Size?
British Airways is generally reasonable, but on busy flights gate agents use bag sizers and actively check cabin bags. If your bag does not fit the sizer, it will be asked to go into the hold — and if your checked baggage allowance is already used, a fee may apply.
BA has tightened cabin bag checking at busy Heathrow and Gatwick gates in 2026. Bag sizers are in use, personal items are being counted, and oversized cabin bags are routinely tagged at the gate and moved to the hold.
The safest approach is to measure your bag when it is fully packed, not empty. Wheels, handles, and side pockets all count toward the dimensions.
Is the British Airways Carry-On Allowance the Same on International Flights?
British Airways applies the same cabin baggage allowance on domestic, European, and international flights. The cabin bag size limit of 56 x 45 x 25 cm and personal item limit of 40 x 30 x 15 cm apply regardless of your destination.
If part of your itinerary is operated by a partner airline such as American Airlines or Iberia, different carry-on rules may apply. Some partner-operated flights use a smaller cabin bag limit of 56 x 36 x 23 cm. Always check the baggage policy of the operating carrier before you travel.
Can I Bring a Backpack as My Carry-On on British Airways?
Yes. You can bring a backpack as your main carry-on bag as long as it stays within 56 x 45 x 25 cm. A backpack can also count as your personal item if it fits within 40 x 30 x 15 cm and slides under the seat in front of you.
The distinction matters for packing strategy. If your backpack is large and fits in the overhead bin, it counts as your cabin bag. A smaller daypack or laptop bag that sits under the seat counts as your personal item. You can bring both.
What Is British Airways’ Liquids Rule for Carry-On Bags?
Liquid rules depend on your departure airport.
Liquid rules depend on your departure airport. Some major UK airports are rolling out new CT scanners that relax the 100 ml limit and allow larger liquid containers in cabin bags. Many other UK airports still follow the 100 ml rule, and US airports follow TSA’s 3-1-1 liquid policy. Always check the latest security rules at your departure airport before you travel.
Always check the rules at your departure airport before travel.
What Else Can I Bring in My Carry-On on British Airways?
Beyond the standard cabin bag and personal item, certain additional items are allowed in the cabin at no extra charge:
Medication
Medical devices
Power banks and spare batteries
Infant essentials
What Happens If My Carry-On Is Too Big at the Gate?
If your carry-on is too large and will not fit in the overhead bin, British Airways will usually ask you to check it at the gate. On busy flights this is sometimes done for free, but if your bag clearly breaks the size rules a fee may be charged.
To avoid this, always measure your bag when packed and check it against the 56 x 45 x 25 cm limit including all handles and wheels. If your cabin bag is gate-checked, make sure your valuables, medication, and electronics are in your personal item, which stays with you in the cabin.
British Airways Carry-On Allowance vs. Other Airlines
| Airline | Free Cabin Bag Size | Free Personal Item | Combined Weight |
| British Airways | 56 x 45 x 25 cm | 40 x 30 x 15 cm | 23 kg combined |
| easyJet | 45 x 36 x 20 cm | 45 x 36 x 20 cm (paid) | Weight checked |
| Ryanair | 40 x 20 x 25 cm (free) | Not applicable | Not published |
| American Airlines | 56 x 36 x 23 cm | 43 x 33 x 20 cm | Not published |
| Avelo Airlines | Personal item only | 17 x 13 x 9 in | Not published |
British Airways stands out for having one of the most generous free cabin baggage allowances among both UK and international full-service carriers. For a broader comparison, see the airline carry-on rules hub.
Real Traveler Scenarios on British Airways.
Weekend trip within the UK
A cabin bag and personal item are usually enough for a short trip with no extra baggage costs.
Long-haul flight to the US
The carry-on allowance remains the same, but TSA liquid restrictions apply on the return journey.
Family traveling with an infant
Parents receive their normal cabin baggage allowance plus additional infant essentials.
Tips to Make the Most of Your British Airways Cabin Baggage
- Measure bags when packed
- Keep valuables in your personal item
- Check liquid rules at departure airport
- Carry power banks in the cabin
Common Carry-On Mistakes on British Airways
- Assuming the personal item size is the same as on other airlines. BA’s 15 cm depth limit is stricter than many carriers.
- Packing all valuables in the cabin bag. If it gets gate-checked, those items go into the hold.
- Not checking whether the operating carrier on a connecting flight has different rules.
- Forgetting that duty-free purchases count toward your cabin allowance.
- Assuming the 2-litre liquids rule applies everywhere. It only applies at specific UK airports — not at most US, European, or smaller UK airports.
Key Takeaways: British Airways Carry-On Allowance
- Every passenger gets a free cabin bag (56 x 45 x 25 cm) and a free personal item (40 x 30 x 15 cm) on all fares.
- The combined weight limit for both bags is 23 kg.
- Size is enforced more strictly than weight, especially at busy Heathrow and Gatwick gates.
- The personal item must fit under the seat and is guaranteed to stay in the cabin.
- Liquids rules depend on your departure airport — Heathrow, Gatwick, Edinburgh, and Birmingham allow up to 2 litres per container; most other airports still apply the 100ml rule.
- Spare batteries and power banks must always travel in the cabin, in your personal item.
- The carry-on allowance is the same across all BA cabin classes and on BA CityFlyer and BA Euroflyer flights.
Frequently Asked Questions (FAQs)
What is the British Airways carry-on baggage allowance?
Every British Airways passenger gets one cabin bag up to 56 x 45 x 25 cm and one personal item up to 40 x 30 x 15 cm, free on all fares including Economy Basic. Each item can weigh up to 23 kg, but your cabin bag must be light enough for you to lift it into the overhead locker yourself.
What is the British Airways cabin bag size limit?
The maximum cabin bag size on British Airways is 56 x 45 x 25 cm, including handles, wheels, and pockets. Bags larger than this may be gate-checked, particularly on busy flights.
What is British Airways’ personal item size?
The personal item on British Airways can measure up to 40 x 30 x 15 cm and must fit under the seat in front of you. The 15 cm depth limit is shallower than most UK airlines, so check your bag before travelling.
Can I bring liquids over 100ml on British Airways flights?
It depends on your departure airport. Some major UK airports are introducing new CT security scanners that relax the 100 ml liquid limit and allow larger containers in cabin bags. At most other UK airports and at US airports, the 100 ml rule still applies, so always check your departure airport’s current rules.
Does British Airways charge for carry-on bags?
No. Both the cabin bag and the personal item are included free on every BA fare. Unlike budget carriers such as Ryanair or Spirit, British Airways does not charge for overhead bin access.
Does British Airways have a carry-on weight limit?
Each item can weigh up to 23 kg, but British Airways expects you to be able to lift your cabin bag into the overhead locker without assistance.
British Airways rarely weighs carry-on bags at check-in, but you must be able to lift your bag into the overhead locker without help.
Is the British Airways carry-on allowance the same on US flights?
Yes. The cabin bag and personal item allowance of 56 x 45 x 25 cm and 40 x 30 x 15 cm applies on all routes including transatlantic flights. However, the liquids rule at US airports follows the TSA’s 100ml / 3.4 oz limit, not the UK 2-litre allowance.
What happens if my carry-on is too big on British Airways?
If your cabin bag does not fit in the overhead locker or the gate sizer, BA staff will ask you to check it into the hold. On some flights this is free; if your checked baggage allowance is already used, a fee may apply. Always keep essential items in your personal item to avoid problems.
Flytripinfo.com provides independent travel guidance and is not affiliated with British Airways.
Disclaimer: All information on Flytripinfo.com is provided for general travel guidance only. Airline policies, seat fees, and allowances can change at any time without prior notice. While we strive to keep our content accurate and updated, travelers should always verify details directly with the airline before their journey. Flytripinfo.com is not responsible for any errors, delays, or decisions made based on the information provided.
