Brussels Airlines in-cabin pet policy — and the carriers that fit
Brussels Airlines allows small pets in the cabin in a carrier up to 21.7 × 15.7 × 9.1 in, soft-sided, stowed under the seat in front of you. Already own a carrier? Enter its measurements below to check it against this limit. In-cabin fee: An additional fee applies per flight, purchased when booking. 2 of the 15 carriers we track clear that published limit.
The Sherpa Original Deluxe (Small) leaves the most room — 0.6" on its tightest dimension, against just 0.1" for the Mr. Peanut's Gold Series Mini (Low-Profile). Brussels's 9.1" height ceiling sits mid-pack among the 77 airlines we track (shared with airBaltic, Austrian, Discover, Edelweiss, Eurowings, ITA, Lufthansa, SAS Scandinavian, Swiss International, Turkish): Aegean, Air Europa, Air France and Air Transat allow more, while EL AL Israel allows only 7".
Will your carrier fit Brussels Airlines?
Measure the outside of your carrier (bulges included) and enter it below. The check uses Brussels Airlines’s published 21.7 × 15.7 × 9.1 in limit — height is checked strictly, the footprint may rotate.
Carriers that clear Brussels Airlines (21.7 × 15.7 × 9.1 in)
Roomiest margin first. Sized to the airline’s limit, not to your pet — measure your pet first →
| Carrier | Size | Fit | Buy |
|---|---|---|---|
 Sherpa Original Deluxe (Small) up to ~8 lb · max pet 13″ long × 7.5″ tall | 15 × 10 × 8.5 in | Fits 0.6" spare | See on Amazon → |
Mr. Peanut's Gold Series Mini (Low-Profile) up to ~15 lb · over Brussels Airlines's 17.6 lb limit once the bag is counted | 17 × 11 × 9 in | Fits 0.1" spare | Not available on Amazon right now |
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Brussels Airlines pet rules
| Max carrier size (published) | 21.7 × 15.7 × 9.1 in |
| Soft-sided required? | Yes |
| In-cabin fee | An additional fee applies per flight, purchased when booking; Brussels Airlines publishes no single figure and carriage is subject to availability · compare all airlines → |
| Species allowed | small dogs, cats |
| Weight | 8 kg (17.6 lb) including the transport bag |
| Pets | Not published |
| Booking | Book in advance online via "My booking" or through the Brussels Airlines Service Centre — subject to availability · what to book, buy and pack → |
Source: official Brussels Airlines pet policy · verified 2026-08-25 · how Brussels Airlines ranks on fee and space →
Carriers that fit Brussels Airlines
Matched to Brussels Airlines's published 21.7 × 15.7 × 9.1 in limit (height checked strictly; footprint may rotate). See the full Brussels Airlines carrier shortlist →
Affiliate link — we may earn a small commission at no extra cost to you. It never changes our specs or which carriers we list.
This table ranks by Brussels Airlines’s size limit — not by your pet. The weight under each carrier is what that size is rated to hold. A bag can clear the airline and still be the wrong size for the animal, which is the most common reason one goes back — measure your pet first →
| Carrier | Size | Fit | Buy |
|---|---|---|---|
Sherpa Original Deluxe (Small) up to ~8 lb · max pet 13″ long × 7.5″ tall | 15 × 10 × 8.5 in | Fits 0.6" spare | See on Amazon → |
Mr. Peanut's Gold Series Mini (Low-Profile) up to ~15 lb · over Brussels Airlines's 17.6 lb limit once the bag is counted | 17 × 11 × 9 in | Fits 0.1" spare | Not available on Amazon right now |
Mr. Peanut's Gold Series Standard (Expandable) up to ~20 lb · over Brussels Airlines's 17.6 lb limit once the bag is counted | 18 × 11 × 10 in | Flexes — 0.9" over | Not available on Amazon right nowIn stock and fits the same airlines: Petmate Soft-Sided Kennel Cab (Medium) |
Sherpa Original Deluxe (Medium) up to ~16 lb · max pet 16″ long × 9.5″ tall · over Brussels Airlines's 17.6 lb limit once the bag is counted | 17 × 11 × 10.5 in | Flexes — 1.4" over | See on Amazon → |
Sherpa Original Deluxe (Large) up to ~22 lb · max pet 18″ long × 10.5″ tall · over Brussels Airlines's 17.6 lb limit once the bag is counted | 19 × 11.75 × 11.5 in | Flexes — 2.4" over | See on Amazon → |
SturdiBag Pro (Large, Flexible Height) pet size not published | 18 × 11.5 × 11.5 in | Flexes — 2.4" over | Not available on Amazon right nowIn stock and fits the same airlines: Petmate Soft-Sided Kennel Cab (Medium) |
9 carriers too big for Brussels Airlines
Petmate Soft-Sided Kennel Cab (Medium) up to ~10 lb | 17 × 10 × 10 in | Too tall (10" > 9.1") | View on Amazon |
Diggs Passenger pet size not published · Diggs discontinued this carrier — link goes to similar carriers | 17 × 12 × 10.5 in | Too tall (10.5" > 9.1") | Compare similar on Amazon → |
ibiyaya JetPaw Expandable Backpack up to ~17 lb | 18 × 12 × 10.5 in | Too tall (10.5" > 9.1") | View on Amazon |
Sleepypod Atom up to ~12 lb | 17 × 8.5 × 10.5 in | Too tall (10.5" > 9.1") | View on Amazon |
Away The Pet Carrier pets up to ~18 lb | 18.7 × 10.8 × 10.75 in | Too tall (10.75" > 9.1") | Compare similar on Amazon → |
Petsfit (Medium) Expandable Soft-Sided up to ~13 lb | 17 × 11 × 11 in | Too tall (11" > 9.1") | View on Amazon |
Bergan Comfort Carrier (Small) pet size not published | 16 × 8 × 11 in | Too tall (11" > 9.1") | View on Amazon |
Frisco Premium Airline-Compliant Carrier up to ~22 lb | 18 × 11 × 11 in | Too tall (11" > 9.1") | Compare similar on Amazon → |
Sleepypod Air up to ~18 lb | 22 × 10.5 × 10.5 in | Too big | View on Amazon |
How to confirm your actual under-seat space
Brussels Airlines's number is its published maximum, not a guarantee for your exact seat. Before you buy or fly:
- Check which aircraft operates your flight (in your booking or on a seat-map site).
- Avoid bulkhead and exit rows — bulkheads have no under-seat storage and most airlines ban pets there — and check this airline's seat rules above.
- Call Brussels Airlines to confirm under-seat dimensions for that aircraft, or
- Choose a collapsible / flexible-height carrier that adapts to a tighter space.
More airlines: Air Canada · Alaska Airlines · Allegiant Air · American Airlines · Breeze Airways · Delta Air Lines · Frontier Airlines · Southwest Airlines · United Airlines · Copa Airlines · Croatia Airlines · Discover Airlines · all →
Common questions
What size pet carrier does Brussels Airlines allow in the cabin?
Brussels Airlines's recommended maximum in-cabin carrier is 21.7 × 15.7 × 9.1 in. It must fit fully under the seat in front of you. Source: the Brussels Airlines pet policy.
How much does Brussels Airlines charge for an in-cabin pet?
An additional fee applies per flight, purchased when booking; Brussels Airlines publishes no single figure and carriage is subject to availability. Always confirm the current fee on the official Brussels Airlines pet page before you fly.
Which pet carriers fit Brussels Airlines?
2 of the 15 carriers we track clear Brussels Airlines's published 21.7 × 15.7 × 9.1 in. The roomiest is the Sherpa Original Deluxe (Small), with 0.6" to spare on its tightest dimension. The heaviest pet any carrier that clears Brussels Airlines is rated for is 15 lb. Full shortlist: /fits/brussels-airlines/.
Does Brussels Airlines require a soft-sided pet carrier?
Yes — Brussels Airlines requires a soft-sided carrier in the cabin. Height is what rules carriers out: Brussels Airlines publishes 9.1", against 13" at the most generous airline we track.
How many pets can I bring in the cabin on Brussels Airlines?
Not published. Species accepted: small dogs, cats. Weight limit: 8 kg (17.6 lb) including the transport bag. Book in advance online via "My booking" or through the Brussels Airlines Service Centre — subject to availability