SNChecked 22 Oct 2026 against brusselsairlines.com
Brussels Airlines cabin bag size 2026
On Brussels Airlines’ cheapest fare (Economy Basic (short and medium-haul)) you can bring one free under-seat bag up to 40 × 30 × 15 cm. A cabin bag up to 55 × 40 × 23 cm and 8 kg isn’t included on Economy Basic (short and medium-haul). It comes with Economy Light, Comfort, Comfort Green and Flex (short and medium-haul), Economy and Premium Economy (long-haul), Business Comfort, Comfort Green and Flex (short and medium-haul) and Business and First (long-haul).
Check my bag against Brussels Airlines- Free under-seat bag
- 40 × 30 × 15 cmOn Economy Basic (short and medium-haul)
- Overhead cabin bag
- 55 × 40 × 23 cmup to 8 kgNot on the cheapest fare
Check your bag against Brussels Airlines’ limits
Brussels Airlines hand luggage and cabin bags by fare
What each ticket type includes, as published by Brussels Airlines.
| Fare | Under-seat bag | Cabin bag |
|---|---|---|
Economy Basic (short and medium-haul)
| Included 40 × 30 × 15 cm The only bag included on this fare (Brussels Airlines calls it a personal item). The airline suggests keeping it under the seat in front of you. | Paid add-on 55 × 40 × 23 cm · 8 kg Not included. The Brussels Airlines page read does not say how to add one or what it costs. |
Economy Light, Comfort, Comfort Green and Flex (short and medium-haul)
| Included 40 × 30 × 15 cm Small items such as a handbag or laptop bag are best kept under the seat in front of you. | Included 55 × 40 × 23 cm · 8 kg One cabin bag as well as the under-seat bag. |
Economy and Premium Economy (long-haul)
| Included 40 × 30 × 15 cm Best kept under the seat in front of you. | Included 55 × 40 × 23 cm · 8 kg One cabin bag as well as the under-seat bag. |
Business Comfort, Comfort Green and Flex (short and medium-haul)
| Included 40 × 30 × 15 cm Best kept under the seat in front of you. | Included 55 × 40 × 23 cm · 8 kg Two cabin bags are allowed. The page lists max. 8 kg and 55 × 40 × 23 cm and does not say whether the 8 kg is per bag. |
Business and First (long-haul)
| Included 40 × 30 × 15 cm Best kept under the seat in front of you. | Included 55 × 40 × 23 cm · 8 kg Two cabin bags are allowed. The page lists max. 8 kg and 55 × 40 × 23 cm and does not say whether the 8 kg is per bag. |
If your bag is too big at the gate
If your cabin bag does not follow the rules, it is taken at the check-in counter or the gate and goes in the hold at your cost. The fee is much higher than checked baggage booked in advance and can only be paid by credit card.
€60 to €110, depending on the route (CHF 60 to 110, USD 75 to 125)
It’s almost always cheaper to add the right bag when you book or online before you fly.
Other Brussels Airlines cabin rules worth knowing
- Economy Basic began as a trial on about 20 routes in April 2026, so not every route offers it yet.
- Any bag you bring to the gate counts as cabin baggage, whatever your checked baggage allowance is.
- On full flights, some compliant cabin bags may have to go in the hold. Brussels Airlines emails you first and you can drop the bag at check-in free of charge.
- If your bag goes in the hold, take out valuables, medicines and battery-powered items such as power banks, laptops and e-cigarettes first.
Also check before you fly Brussels Airlines
Power banks on Brussels Airlines
Spare batteries and power banks must go in your hand luggage, never in the hold.
Power-bank rules and Wh calculatorLiquids depend on the airport
The airline doesn’t set the liquids limit. The departure airport’s security does. Some now allow up to 2 litres.
Liquids rules by airportBrussels Airlines cabin bag questions
What size is Brussels Airlines’ free under-seat bag (personal item)?
40 × 30 × 15 cm on the Economy Basic (short and medium-haul) fare. It must fit under the seat in front of you.
What size cabin bag can I take on Brussels Airlines?
Up to 55 × 40 × 23 cm and 8 kg. It’s included with Economy Light, Comfort, Comfort Green and Flex (short and medium-haul), Economy and Premium Economy (long-haul), Business Comfort, Comfort Green and Flex (short and medium-haul) and Business and First (long-haul).
What is the Brussels Airlines hand luggage weight limit?
The cabin bag can weigh up to 8 kg. Brussels Airlines’ published rules give no weight limit for the free under-seat bag.
What happens if my bag is too big for Brussels Airlines?
If your cabin bag does not follow the rules, it is taken at the check-in counter or the gate and goes in the hold at your cost. The fee is much higher than checked baggage booked in advance and can only be paid by credit card. €60 to €110, depending on the route (CHF 60 to 110, USD 75 to 125)
What are the Brussels Airlines cabin bag dimensions in inches?
Free under-seat bag (40x30x15 cm): 15.7 × 11.8 × 5.9 in. Cabin bag (55x40x23 cm): 21.7 × 15.7 × 9.1 in.
How many litres is the Brussels Airlines cabin bag allowance?
At most 18 litres for the free under-seat bag (40x30x15 cm) and at most 50.6 litres for the cabin bag (55x40x23 cm). That is the volume of a square-cornered box with exactly those measurements. A real bag has rounded corners, so check the size on the label as well as the litres.
Can I use a backpack as my free under-seat bag on Brussels Airlines?
Usually yes. The limit is on size, not on the type of bag, so a backpack that measures 40 × 30 × 15 cm or less when packed fits the free allowance. Straps and pockets count towards the size.
What are the liquids rules for Brussels Airlines hand luggage?
Brussels Airlines doesn’t set the liquids limit. The airport you fly from does: some airports still enforce 100 ml, while others now allow containers up to 2 litres. Check your departure airport on our liquids rules page.
Shopping for a bag? See cabin bag size in litres to turn centimetres into litres.
How Brussels Airlines compares
Free allowances on the cheapest fare of similar airlines.
| Airline · cheapest fare | Free under-seat bag | Overhead cabin bag | Details |
|---|---|---|---|
| Brussels AirlinesEconomy Basic (short and medium-haul) | Under-seat40 × 30 × 15 cm | Cabin bagPaid add-on · 55 × 40 × 23 cm · 8 kg | |
| Air FranceBasic | Under-seat40 × 30 × 15 cm | Cabin bagPaid add-on · 55 × 35 × 25 cm · 12 kg | |
| American AirlinesBasic Economy | Under-seat45 × 35 × 20 cm | Cabin bag56 × 36 × 23 cm | |
| British AirwaysEconomy (no checked bag) | Under-seat40 × 30 × 15 cm | Cabin bag56 × 45 × 25 cm | |
| Delta Air LinesDelta Main Basic (Basic Economy) | Under-seatIncluded · size not published | Cabin bag56 × 35 × 23 cm |