Introduction
Southwest pet planning a trip and wondering whether you need a pet health certificate for your furry friend? The airline industry can be tricky when it comes to pet travel rules, and each airline has its own set of guidelines. If you’re flying with Southwest Airlines, you might be asking: Do I need a health certificate for my pet?
Let’s break it down in a simple, clear way so you know exactly what’s expected before you hit the skies with your pet.
Southwest Airlines Pet Policy Overview
Before diving into paperwork, it helps to know what Southwest even allows. Southwest pet
Types of Pets Allowed
As a result, neither cargo nor checked pets have any options.
Cabin vs. Cargo
Southwest does not allow pets in the cargo hold, in contrast to many other carriers. A little, soft-sided carrier that can fit beneath the seat in front of you is required for your pet’s voyage.
Restrictions and Limitations
- One pet per customer (with some exceptions for two pets of the same species in the same carrier)
- Destination limits: Pets are not allowed on international flights or flights to/from Hawaii

Health Certificate Requirements Explained
What Is a Pet Health Certificate?
A pet health certificate (sometimes called a Certificate of Veterinary Inspection) is an official document signed by a licensed vet. It confirms that your pet is healthy and up-to-date on vaccines.
Why Some Airlines Require It
Health certificates help airlines confirm your pet isn’t carrying infectious diseases or illnesses. It’s especially important for international travel or if your destination state has specific animal health regulations.
Domestic vs. International
Most international flights require health certificates. However, requirements vary for domestic travel based on airline and destination rules.
Does Southwest Require a Health Certificate?
Policy for Domestic Flights
No. Southwest does NOT require a pet health certificate for domestic flights. If you’re flying within the continental U.S. with your cat or dog, you do not need to show a health certificate at check-in.
What Southwest Officially States
Southwest’s official pet policy clearly says:
“A pet traveling with a Customer in-cabin is not required to have a health certificate.” Southwest pet
So unless you’re flying with a service animal or through an interline flight involving another airline, you’re good to go without one.
Exceptions or Special Cases
Even though Southwest doesn’t require a certificate, you should always check the rules of your destination state. Some U.S. states (like Hawaii) may have their own entry requirements, regardless of the airline’s policy.

How to Prepare Your Pet for a Southwest Flight
Even without needing a health certificate, there are some must-haves and must-dos.
Approved Pet Carriers
The max dimensions are generally:
- 18.5” long x 8.5” high x 13.5” wide
You can purchase Southwest’s official pet carrier or use another soft-sided option that fits the size limits.
Check-In Process
There’s no online check-in for pets. You must check in at the ticket booth and pay the $95 pet fee each way.
Fees and Documentation
No extra paperwork is needed—but bring:
- Proof of your reservation
- Your pet in its carrier
- Payment for the pet fare
Common Misconceptions About Pet Health Certificates
Are They Required for All Airlines?
Nope. Policies vary. Some require them, especially for cargo pets or international travel. Southwest keeps it simple for domestic flights—no certificate needed.
Is It the Same as a Vaccination Record?
Not exactly. Vaccination records are part of a health certificate but are not the whole thing. You may still want to carry shot records just in case.

Scenarios Where You Might Need a Certificate
Connecting Flights with Other Airlines
If you’re hopping from a Southwest flight to another airline that does require a health certificate, you’ll need to have one on hand.
State-Specific Regulations
Some states require health certificates for animals entering, especially via air travel. Always check the Department of Agriculture website for your destination state.
ESA and Service Animal Policies
Emotional support animals are no longer accepted as service animals by Southwest.Only trained service dogs are allowed and may need documentation—but not a health certificate. Southwest pet
Tips for Flying with Pets on Southwest
Book Early
Only allows a limited number of pets per flight (usually 6). Reserve a spot as soon as you book your ticket.
Keep Pets Calm
- Give them a chance to potty before the flight
- Bring familiar toys or blankets
- Avoid sedatives unless approved by your vet
Alternatives to Flying with Pets
Pet Relocation Services
For long-distance moves, consider professional pet shippers who handle all travel requirements—including health certificates.
Driving vs. Flying
For shorter distances, road-tripping with your pet can reduce stress and avoid airline restrictions.
Conclusion
To wrap it up— Airlines does not require a pet health certificate for domestic flights with cats or dogs. That’s one less thing to worry about! But don’t forget: while the airline doesn’t require it, some destinations or connecting flights might. Always double-check before takeoff.
FAQs
Does require documentation of my immunizations?
No, doesn’t require vaccination proof for pets on domestic flights, but it’s a good idea to carry it just in case.
What kind of carrier is allowed?
Soft-sided carriers that fit under the seat in front of you are required.
Can I fly with my large dog on Southwest?
Large dogs are not permitted—even in cargo.It costs $95 one-way per pet in the cabin.
Are emotional support animals treated as pets?
Yes.longer accepts emotional support animals as service animals.