Everything You Need to Know About Southwest Airlines Pet Carrier Dimensions
If you’re planning on traveling with your furry friend on Southwest Airlines, understanding their pet carrier size restrictions is crucial. In this comprehensive guide, I’ll cover Southwest’s pet carrier dimensions and policies, tips for choosing the right carrier, and handling your pet during the journey. By the end, you’ll have all the info needed for a stress-free trip with your pet.
Southwest Airlines Pet Carrier Size Limits
Southwest allows both cats and dogs to fly as cargo in approved hard-sided or soft-sided kennel-type carriers. The maximum dimensions are:
- Length + width + height cannot exceed 108 inches (274 cm) total
- Individual dimension cannot exceed 60 inches (152 cm)
Notably, these are the total measurements – so for example, a carrier that is 24″ x 18″ x 12″ would work as 24+18+12=54, which is under the 108″ limit.
Choosing the Right Size Carrier
When shopping for a carrier, it’s important to buy one your pet is completely comfortable in. From my experience, most dogs and medium-sized cats do fine in carriers 18-24″ long. However, I’d advise going a bit larger if your pet seems anxious or isn’t fully grown yet.
You’ll also want space for your pet to stand up and turn around comfortably. Try test fitting them at home before your trip. A stressed pet is no fun for anyone! A padded or collapsible soft-sided carrier is usually a good balance of coziness and airline compliance.

Additional Carrier Requirements
In addition to size limits, Southwest requires carriers to meet these criteria:
- Escape-proof and secure closure (e.g. zip ties, locks, or sturdy latches)
- Adequate ventilation (no more than 1/3 of the surface enclosed)
- Reinforced bottom and sides (able to withstand scratching/biting without breaking/collapsing)
- Easy for your pet to stand/turn comfortably
- Water/food bowls secured, absorbed, or removed
The carrier should have your contact info clearly labeled on the outside. Inside, line it with absorbent pads or towels to minimize messes.
Preparing Your Pet for Travel
Getting your pet acclimated to their carrier well before the trip is crucial. Leave it out for them to explore at their own pace. Toss treats in to build positive associations. Once they’re chill in it at home, work up to short practice car rides.
On travel day, keep them comfortable and calm. Don’t feed within a few hours of the flight but do offer water. Consider tranquilizers prescribed by your vet if they have severe anxiety. A snug toy or article of your clothing with your scent can also help soothe them.
Checking In and During the Flight
At the airport, take your pet carrier straight to the ticket counter or designated pet area for check-in. I’ve faced situations where the regular lines were way too chaotic with small animals. Make sure ID tags are visible externally.

Once checked, your pet will be transported in the climate-controlled cargo hold separate from passengers for the flight duration. Temperature and pressure are carefully controlled. Still, it’s understandable to feel concerned for their comfort. Rest assured flight attendants will care for them.
Picking Up Your Pet
At your destination, head directly to the pet pick-up area. Reunion photos can wait – your pet will be eager for you! Depending on flight delays, you may have to wait up to an hour. But the staff works hard to reunite pets ASAP. Your patience will yield rewarding cuddles!
I hope this comprehensive guide has cleared up any questions about Southwest Airlines pet travel policies and eased your mind for an upcoming trip. Safe travels to you and your furry companion!
Let me know if you need any other pet travel tips or have additional questions. I’m always happy to help fellow pet parents navigate this process. Best of luck with your upcoming journey – I’m sure it will be a positive experience for all with the right preparation.
Southwest Airlines Pet Carrier Dimensions
| Pet Type | Maximum Length | Maximum Width | Maximum Height |
|---|---|---|---|
| Cats | 18 inches | 14 inches | 9 inches |
| Small Dogs | 18 inches | 14 inches | 9 inches |
| Medium Dogs | 18 inches | 14 inches | 9 inches |
| Wooden or Fabric Carrier | 23 inches | 14 inches | 9 inches |
| Soft-Sided Carrier | 23 inches | 17 inches | 10 inches |
FAQ
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What size pet carrier is allowed on Southwest Airlines?
Southwest allows pet carriers up to 18 inches long by 14 inches wide by 9 inches tall. Basically any soft-sided carrier that fits under the passenger seat in front of you is fine.

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Can I bring a larger pet carrier as personal item?
Unfortunately no, the carrier has to fit completely under the seat as a personal item. While a bigger carrier might be nicer for your pet, Southwest is pretty strict on the dimensions. Maybe try putting a portable bed or blanket inside to give your furry friend more space.
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Is there a weight limit for pet carriers?
Southwest does not have a specific weight limit for pet carriers. However, you want to make sure it’s light enough for the owner to easily lift and store under the seat. A carrier that’s too heavy could potentially cause safety issues if it falls during turbulence. I’d say aim to keep it under 15 pounds.
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What animals are allowed in carriers?
In general, cats and dogs are the most common animals allowed in carriers on Southwest flights. However small birds, rats, rabbits and other rodents might be permitted. You’d have to check with Southwest whether reptiles or other exotic pets are OK. No snakes being brought on board is a reasonable rule despite claims they pose little danger.
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Do I need to provide any documents?
Yes, when traveling with an animal on Southwest you must bring an updated vaccination record. Appears this applies to both check-in and carry-on pets. It helps ensure the health of all passengers and animals. Some airlines also require a health certificate – always good to double check requirements.
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What if my pet gets scared during the flight?
Don’t panic if your pet seems worried on take-off or landing. offer soothing words and treats to comfort them. Research shows speaking calmly helps reduce stress. At the same time, don’t force interaction if they seem distressed. Overall flying is quite safe for pets and getting them used to the carrier is key. Perhaps ask a vet for anxiety medication if needed.

In summary, make sure to review Southwest policies on pet carriers and required documents thoroughly before your trip. Adhering to size limits and providing proper records will help ensure a smooth journey. Most small pets fly just fine if acclimated to the carrier. However, if in doubt it’s better to find alternative transportation rather than cause distress. Safety should always come before convenience when traveling with animals. Do you have any other questions?
