Can You Bring a Cat on Southwest Airlines? | Cabin Cat Rules

Yes, cats can fly in the cabin on Southwest when they stay in an approved carrier and you pay the pet fee.

Flying with a cat can feel like a big swing, even when the trip is short. The good news: Southwest does allow small domestic cats in the cabin on many routes, as long as you follow their carrier rules and book the pet spot. The not-so-fun part is that pet space is limited per flight, and Southwest sets a few seat and check-in limits that can surprise first-timers.

This article walks you through the real-world flow: what qualifies, how to reserve, what happens at the airport, and how to keep your cat calm without breaking airline rules. You’ll finish with a clear plan you can follow from booking day to landing.

Can You Bring a Cat on Southwest Airlines? Rules For In-Cabin Pets

Southwest accepts small, vaccinated domestic cats that are at least eight weeks old, traveling with a ticketed passenger. Your cat must ride inside a pet carrier the whole time you’re in the gate area, during boarding, and while onboard. The carrier has to be leak-proof and well ventilated, and your cat needs to be able to stand and move around inside it without being cramped.

Southwest doesn’t transport pets in the cargo compartments. That means the only standard pet option is in-cabin travel in a carrier under the seat in front of you. Pets aren’t accepted on international itineraries. Southwest also doesn’t accept pets on itineraries between the continental U.S. and Hawaii.

One more rule that trips people up: if you’re traveling with a pet, you can’t sit in an exit row, and you can’t sit in a seat with no under-seat space in front of you.

What Counts As A “Cat Spot” On A Southwest Flight

Southwest limits the number of pet carriers per flight, and they’re taken first-come, first-served. Once those slots are gone, that flight is sold out for pets even if plenty of seats remain for humans. That’s why booking the pet reservation early matters more than hunting for the lowest fare.

Southwest allows one pet carrier per passenger. One carrier can hold up to two cats, as long as they’re the same species and fit comfortably together. If you’re thinking about putting two cats in one carrier, be honest about how they behave in tight spaces. A carrier that works at home for ten minutes can turn into chaos during a long taxi and climb.

How The Fee Works And When You Pay

Southwest charges a one-way carryon pet fee per pet carrier. For travel within the U.S. mainland, Southwest lists the fee as $125 per pet carrier, one way. You’ll see the fee amount on Southwest’s optional travel charges page, under “Pets: One-way Carryon Pet Charge.” Southwest’s one-way carryon pet charge is separate from your ticket price.

Southwest’s Contract of Carriage spells out a practical detail: pet reservations are booked by calling Southwest, and the pet fare is collected at the airport ticket counter before you go to the gate. If you cancel your reservation, Southwest says you’re eligible for a refund of the pet fare.

Booking Steps That Prevent Day-Of Surprises

Use this order of operations to avoid the classic mess where you buy a ticket and then learn the flight is full for pets:

• Pick your flights first and confirm they work with your timing, since you may want fewer connections.
• Call Southwest to add a pet to your reservation right after you book, or call first if you want to check pet slot availability before paying.
• Write down the name of the agent and the time of the call, then keep your confirmation handy.
• Plan to pay the pet fee at the ticket counter on travel day, and arrive with extra cushion time.

If you’re flying with another person, it can be smart for the cat traveler to board with the carrier as their personal item, while the second person handles the roller bag and any other gear. That keeps your hands free and reduces the chance of bumping the carrier in crowded aisles.

Carrier Rules That Matter In Real Life

Southwest requires the carrier to fit under the seat in front of you for the entire flight. In plain terms, your carrier needs to be low enough to slide under the seat without forcing it or crushing the top. It also has to be secure, ventilated, and leak-proof.

Two tips that save stress at the gate:

• Pick a carrier with a firm base. Soft-sided carriers are common, yet a flimsy bottom sags and makes your cat slide around.
• Check zipper quality. Double zippers with a clip point reduce the chance of an accidental escape during security or boarding.

Southwest sells a branded pet carrier through its store, and it’s sized to fit under many seats. Buying the airline-branded carrier isn’t required, yet it can be a simple way to stay within typical under-seat sizing.

Cat Readiness: What To Do Before Travel Week

A calm travel day starts earlier than the airport. If your cat rarely uses the carrier, don’t wait until the night before. Leave the carrier out at home with the door open and a familiar blanket inside. Feed a few treats near it, then inside it, so the carrier stops being a “bad-news box.”

Keep your prep practical:

• Trim nails a day or two before the flight so frantic scratching doesn’t snag mesh.
• Pack a small roll of paper towels and a few sealable bags for quick cleanups.
• Bring an absorbent pad that fits your carrier’s base, then add a thin blanket on top for comfort.
• Attach an ID tag and a contact label on the carrier handle, even if your cat is chipped.

Food planning depends on your cat. Many cats do better with a lighter meal before leaving home, then a normal meal after arrival. If your cat gets carsick, keep breakfast smaller and carry extra wipes. If your cat gets “hangry,” bring a measured snack for after landing.

Airport Security With A Cat Carrier

At security, you’ll remove your cat from the carrier and send the empty carrier through the X-ray. TSA’s public guidance says you should carry the pet through the checkpoint while the carrier is screened, and a leash can help you maintain control. TSA guidance on pets at security covers the basic flow.

If your cat is skittish, ask the TSA officer for a private screening. That gives you a calmer space to hold your cat while the carrier is checked. Wear a hoodie or a long-sleeve shirt you can wrap around your cat if needed. It’s not a fashion move. It’s a grip move.

One more small detail: skip metal-heavy collars right before screening if they tend to catch on carrier doors. A breakaway collar is better than a stiff buckle collar for travel day.

Boarding And In-Flight Basics That Keep You In Compliance

Once you reach the gate, your cat stays inside the carrier. Southwest’s contract terms say the pet must remain in the carrier at all times while in the gate area, during boarding and deplaning, and while onboard. That includes keeping the head and tail inside the carrier.

On the plane, place the carrier under the seat in front of you and keep it there. Try not to keep sliding it out to “check.” Your cat hears your voice, feels your hand on the carrier, and picks up your mood. A steady routine is your friend.

Try these low-drama comfort moves:

• Talk quietly during taxi and takeoff. Your cat recognizes your tone even in a loud cabin.
• Cover part of the carrier with a light cloth if your cat calms down when the carrier is dimmer.
• Keep airflow in mind. Don’t cover the whole carrier, and don’t press it against your bag.

If your cat vocalizes, don’t panic. Many cats “complain” for the first ten minutes and then settle. Focus on steady breathing and a calm voice. Your cat doesn’t need a lecture. They need you to be predictable.

Table: Southwest Cat Travel Rules And Practical Fixes

The rules are the rules, yet the best trips come from knowing how each rule plays out at the airport. Use this table as a planning checklist.

Rule Or Limit	What It Means At The Airport	What To Do
In-cabin only	No pet travel in cargo compartments	Book only if your cat can ride under-seat in a carrier
Pet slots are limited	Some flights sell out for pets even when seats are open	Call early to add the pet reservation
One carrier per passenger	You can’t bring two separate carriers on one ticket	If traveling with two carriers, you need two ticketed travelers
Two cats may share one carrier	Only if both cats fit and tolerate close quarters	Test a long carrier session at home, not on travel day
Carrier must fit under-seat	Gate staff can deny a bulky carrier that won’t stow	Choose a carrier built for under-seat placement
Carrier stays closed	No “lap time” onboard or at the gate	Bring a familiar blanket and keep your voice calm
No exit row or no-stow seats	Seat changes may happen if your boarding pass conflicts	Avoid exit rows; avoid seats with no under-seat space
Pay at the ticket counter	You need time to check in the pet and pay before security	Arrive early and go straight to the counter first
Domestic routes only, no international	Pet option can vanish if any leg is international	Keep the itinerary fully domestic if traveling with a cat
No continental U.S. to Hawaii itineraries	That routing blocks pet travel under standard pet rules	Choose a different destination or a different carrier policy

Connections, Delays, And What To Pack In Your “Cat Kit”

Direct flights are easier on most cats. If you need a connection, keep layover time comfortable. A tight connection adds rushing, noise, and jostling. A longer connection gives you time to find a quieter corner near your next gate.

Your “cat kit” should fit in one small pouch you can grab without digging:

• Folded absorbent pad and a spare liner
• A few treats in a quiet container
• Wipes and a small hand sanitizer
• Paper towels and two sealable bags
• A compact bowl for water at your destination

Many travelers skip the litter plan and do fine on shorter trips. For longer travel days, a disposable travel litter tray can help after landing. If you’re trying that route, test it at home first so it’s not a brand-new object in a new place.

Hotel Arrival: The First 30 Minutes Matter

After landing, your cat may act “normal” one minute, then bolt under a bed the next. That’s common. When you reach your room, set up a small base camp before opening the carrier: water, a little food, and a litter setup in a quiet spot.

Then open the carrier door and let your cat decide. Some cats step out, circle the room, and settle. Others stay put for a while. Either is fine. Keep the room door closed, keep voices low, and avoid sudden knocks from housekeeping by using the “do not disturb” sign if your hotel provides one.

When Southwest Can Say No At The Airport

Even with a reservation, Southwest can refuse transport if a pet shows aggressive behavior or appears incompatible with air travel at the airport, in the gate area, or onboard. Their contract terms also say the pet must be healthy, harmless, inoffensive, odorless, and require no attention during the flight.

In plain language: if your cat is yowling nonstop, lunging at staff, or has a strong odor in the carrier, you risk getting turned away. The fix is not a last-minute argument at the counter. The fix is preparation: a clean carrier setup, a calm handling plan, and realistic expectations about whether your cat can handle a flight day.

Table: A Simple Timeline For Flying With A Cat On Southwest

This timeline keeps you moving in the right order without rushing at the wrong moments.

When	What You Do	Why It Helps
7–10 days before	Carrier practice at home, short sessions, treat rewards	Carrier stops feeling like a trap
48 hours before	Confirm your reservation details and flight timing	Reduces last-minute scrambling
Travel morning	Set up the carrier liner, pack the cat kit, trim clutter	Keeps the carrier clean and stable
Arrive at airport	Go to the ticket counter first to pay the pet fee	Avoids getting stuck at security without payment handled
Security	Remove cat, X-ray carrier, request private screening if needed	Prevents a stressful escape risk
Boarding	Keep carrier closed, slide it under-seat once onboard	Stays within Southwest’s in-cabin rules
After landing	Get to a quiet spot, then head out without lingering	Reduces crowd stress
At lodging	Set water/food/litter first, then open carrier door	Gives your cat a stable “home base” fast

Quick Checks Before You Leave Home

Right before you head out the door, do a fast scan of the basics. It’s boring, and it works.

• Carrier label with your name and phone number
• Absorbent liner set in place
• Cat kit pouch packed and easy to grab
• Boarding pass and ID in a pocket you can reach one-handed
• Plan for security: hold cat securely, carrier goes on the belt

If you follow the rules, book early, and keep your setup simple, flying Southwest with a cat can be totally manageable. Most travel-day stress comes from avoidable surprises. Take those off the table, and the trip gets a lot smoother.