Flying with your dog can be an adventure in itself. After 14 years of traveling with my canine companion, I’ve learned that the right travel bag is a game‑changer. Whether you’re booking a flight for a quick getaway or a long-haul journey, choosing the right dog carrier is crucial. In this comprehensive guide, we cover everything from airline-approved dimensions to practical tips that ensure you and your dog have a smooth, enjoyable travel experience.
Why the Right Travel Bag Matters
When you decide to book a flight with your dog, your travel bag isn’t just an accessory—it’s a necessity. Over the years, I’ve experienced firsthand how critical it is to choose a carrier that meets airline restrictions and is comfortable for your pet. A well‑designed travel bag can make the difference between a smooth journey and a stressful ordeal. From keeping your dog calm to ensuring you pass airline check‑in with flying colors, the right bag can truly set you up for success.
Understanding Airline Weight & Size Restrictions
Weight Considerations
One of the most important factors in choosing a travel bag for your dog is its weight. Airlines are strict about the combined weight of your pet and the carrier.
- Tip: Always weigh your dog with the bag before your flight. Even a small amount of extra padding can push the total weight over the limit.
- For example, if your dog is on the heavier side (close to 8–10 kg), removing unnecessary interior lining or padding can help you stay within the airline’s weight restrictions.
Remember: Airlines may deny boarding if the combined weight exceeds their limit. Always check your bag’s weight at your local pet store or with your home scale.
Dimensions and Under-Seat Requirements
Airlines typically require that the pet carrier fits under the seat in front of you. The standard dimensions vary between carriers and airlines, but many European airlines expect a carrier around 18″ L x 11″ W x 11.5″ H (approximately 46 cm x 28 cm x 29 cm) or smaller.
- Insight: While most airlines insist on soft‑sided bags for ease of stowing, it’s the height of the bag that often becomes a sticking point.
- When filling out airline forms, some travelers admit they “just fill in whatever the maximum is” because their bag’s design naturally meets those dimensions—but it’s best to verify before you travel.

Key Features to Look for in a Dog Travel Bag
Removable Interior Padding
A critical tip from my personal experience: if your dog is near the airline’s weight limit, remove or reduce the interior lining to save weight.
- Why It Matters: Removable padding means you can customize the bag’s weight while still providing comfort for your dog.
- Pro Tip: Before flying, test your dog in the bag with and without the padding to ensure they remain comfortable.
Carry Straps and Portability
In busy airports, being able to carry your dog’s travel bag comfortably is essential.
- Look for carriers with adjustable shoulder straps that allow you to carry the bag like a sports backpack.
- This feature is especially important if you have to navigate long distances without a trolley or luggage cart.
Mesh Panels and Expandable Sides
Ventilation and extra space are key.
- Mesh Panels: Ensure the carrier has ample mesh panels for ventilation, so your dog stays cool and calm during the flight.
- Expandable Sides: Some carriers have collapsible or expandable sides. Once you’re settled on the plane, these can provide extra room for your dog, especially if they are on the larger side for their breed.

Tips and Tricks for Flying with Your Dog
Pre-Flight Preparations
- Weigh Your Dog and Carrier Together: As mentioned earlier, head to your local pet store or use your own scale to ensure you’re within the weight limit.
- Acclimate Your Dog: Introduce your dog to the travel bag well in advance. This makes the experience positive and less stressful on the day of the flight.
Managing the Bag’s Weight
- Remove Extra Padding: If your bag comes with removable lining, consider taking it out if you’re close to the weight limit.
- Minimalist Packing: Only pack essential items in the carrier. Extra toys or blankets can add unnecessary weight.
Choosing the Right Seat – Extra Legroom
Airline seat configuration can greatly impact your travel experience:
- Opt for Business or Extra Legroom Seats: These seats often have more space under the seat in front, making it easier to stow the carrier.
- Plan Ahead: Book your seats early and request ones with more legroom. This small change can make a significant difference in comfort for both you and your dog.
Product Recommendations and Reviews
Here are some highly recommended travel bags for dogs available on Amazon.co.uk:

- Daisy’s BAG!! Petsfit Expandable Pet Carrier for Cats or Small Dogs
- Dimensions: Expandable to around 18″ x 11″ x 11.5″
- Features: Four‑sided expansion for extra space, ideal for pets up to 18 lbs.
- View on Amazon
amazon.co.uk

2. Paw Ballet Pet Carrier – Airline Approved
- Dimensions: 18″ x 11.5″ x 11.5″
- Features: Collapsible design, removable padding, and durable construction.
- View on Amazon
amazon.co.uk

3. Foldable Pet Carrier Waterproof – Collapsible Soft-Sided
- Dimensions: Approximately 17″ x 11.5″ x 11″
- Features: Waterproof and lightweight, ideal for travel on buses or planes.
- View on Amazon
amazon.co.uk

4. My Elite Fun Rolling Airline Approved Pet Carrier with Wheels
- Dimensions: Engineered to meet under-seat requirements
- Features: 360° swivel wheels, smooth gliding design, and robust construction.
- View on Amazon

5. ROSEBB Cat Carrier Dog Carrier – Collapsible & Airline Approved
- Dimensions: Approximately 17″ x 11″ x 11″
- Features: Suitable for small and medium pets; collapsible for easy storage.
- View on Amazon
NOTE: Always verify dimensions before purchasing!!
European Airlines: In‑Cabin Carrier Dimensions
KLM Royal Dutch Airlines
- Official Requirement: Approximately 46 cm (L) x 28 cm (W) x 24 cm (H)
- Notes: This is the common specification provided on KLM’s pet travel pages.
- Can book your pet online at the same time as your booking.
- Bag & Pet Weight Restriction: 8 kg
- Reference: KLM pet policy
Air France
- Official Requirement: Most sources indicate a requirement around 46 cm x 28 cm x 24 cm.
- Notes: Some secondary sources have mentioned dimensions up to 55 cm x 35 cm x 25 cm, but the more widely accepted (and used by partners) dimensions are around 46 cm x 28 cm x 24 cm.
- Can book your pet online at the same time as your booking
- Bag & Pet Weight Restriction: 8 kg
- Reference: Air France pet information
TAP Air Portugal
- Official Requirement: 45 cm x 30 cm x 23 cm
- Notes: TAP’s guidelines clearly specify soft‑sided carriers that meet these measurements.
- Bag & Pet Weight Restriction: 8 kg
- Reference: TAP pet travel
Aegean Airlines
- Official Requirements:
- Standard Aircraft: Up to 55 cm x 40 cm x 23 cm
- For DH8-100 and ATR Aircraft: Approximately 40 cm x 25 cm x 25 cm
- Notes: Aegean provides slightly different limits depending on the aircraft type.
- Can book your pet online at the same time as your booking
- Bag & Pet Weight Restriction: 8 kg
- Reference: Aegean Airlines pet policy
Lufthansa
- Official Requirement: 55 cm x 40 cm x 23 cm
- Notes: Lufthansa is known for its comprehensive pet policies; this dimension applies for in‑cabin travel.
- Must complete online form to reserve your pet.
- Bag & Pet Weight Restriction: 8 kg
- Reference: Lufthansa pet travel
Swiss International Airlines
- Official Requirement: Generally 55 cm x 40 cm x 23 cm
- Notes: Swiss International follows standards similar to Lufthansa. Check their official site for any recent updates.
- Must complete online form to reserve your pet.
- Bag & Pet Weight Restriction: 8 kg
- Reference: Swiss official website (verify via official documentation)
Austrian Airlines
- Official Requirement: Typically similar to Lufthansa – around 55 cm x 40 cm x 23 cm
- Notes: As a member of the Lufthansa Group, Austrian Airlines aligns its carrier requirements with Lufthansa’s standards.
- Must complete online form to reserve your pet
- Bag & Pet Weight Restriction: 8 kg
- Reference: Austrian Airlines pet policy
SAS Scandinavian Airlines
- Official Requirement: Many reports and customer experiences indicate that SAS requires carriers not exceeding approximately 40 cm x 25 cm x 23 cm
- Notes: SAS often has limited space for in‑cabin pets, so advance booking is recommended.
- Must complete online form to reserve your pet.
- Bag & Pet Weight Restriction: 8 kg
- Reference: SAS travel with animals
LOT Polish Airlines
- Official Requirement: Although LOT does not always list dimensions explicitly, many sources and customer feedback suggest dimensions in the same range as Lufthansa (around 55 cm x 40 cm x 23 cm).
- Notes: It is best to verify directly with LOT or via their website before booking.
- Must complete online form to reserve your pet.
- Bag & Pet Weight Restriction: 8 kg
- Reference: LOT pet travel guidelines
Norwegian Air Shuttle & Vueling
- For Norwegian (and similar U.S.-style carriers):
- Common Requirement: Approximately 18″ x 11″ x 11.5″, which converts roughly to 46 cm x 28 cm x 29 cm.
- Can book your pet online at the same time as your booking
- Bag & Pet Weight Restriction: 8 kg
- For Vueling: Dimensions are often cited around 45 cm x 39 cm x 21 cm.
- Can book your pet online at the same time as your booking
- Bag & Pet Weight Restriction: 8 kg
- Notes: These airlines’ requirements are expressed in inches and align more closely with U.S. standards.
- Reference: Norwegian pet policy
- Reference: Vueling pet guidelines
International Airlines Flying into Europe
For travelers coming from outside Europe, several U.S. carriers operate flights to European destinations and have comparable pet carrier requirements:
American Airlines, Delta Air Lines & United Airlines
- Maximum Dimensions: Generally, these carriers allow pet carriers with dimensions around 18″ x 11″ x 11.5″(approximately 46 cm x 28 cm x 29 cm).
- Notes: These dimensions are designed to ensure that the carrier fits under the seat in the cabin. It’s crucial to verify your specific flight details since some restrictions may vary based on aircraft type or route.
- American Airlines pet travel information – Bag & Pet Weight Restriction: 20lbs
- Delta’s pet travel guidelines – Bag & Pet Weight Restriction: 20lbs
- United Airlines’ pet policy – No weight restriction but the carrier dimensions
Key Considerations for Choosing a Carrier
When selecting an airline-approved pet carrier, keep the following in mind:
- Weight Limits: Always weigh your pet with the carrier. Many airlines have strict limits (commonly around 8 kg total).
- Functional Features: Look for carriers with removable padding, secure carry straps, and mesh panels for ventilation.
- Flexibility: Soft‑sided, collapsible designs can help meet under‑seat requirements and provide additional comfort.
- Testing: Before your flight, test the carrier by visiting a pet store or using a home scale. This ensures you meet the airline’s weight and dimension criteria.
- Airline Specifics: Regulations can vary between airlines, so always verify the latest guidelines on the carrier’s website or by contacting customer service.
Conclusion
Navigating airline pet carrier dimensions is essential for stress‑free travel with your dog. Whether flying with European carriers like KLM, Air France, TAP, Aegean, Lufthansa, and Swiss or international airlines like American, Delta, and United, ensuring your pet’s carrier meets the precise measurements can prevent boarding issues and keep your journey smooth.
By understanding the specifics—such as KLM’s 46 cm x 28 cm x 24 cm, TAP’s 45 cm x 30 cm x 23 cm, or Lufthansa and Swiss’s 55 cm x 40 cm x 23 cm—and combining these insights with practical tips for managing weight and functionality, you’ll be well‑prepared for your next flight.
For more travel tips and product recommendations, check out our dog travel tips guide. Safe travels, and may your next flight be as enjoyable for you as it is comfortable for your furry friend!
Disclaimer:
The information provided in this guide is intended for general informational purposes only. While every effort has been made to ensure that the airline pet carrier dimensions, weight limits, and related policies are accurate and up-to-date, these details are subject to change without notice by the airlines. We strongly recommend that you verify all specifications and requirements directly with the relevant airline or through their official website before booking your travel. Neither the author nor this website assumes any responsibility for errors or omissions, or for any outcomes resulting from the use of this information.
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