What Is Not Allowed On Carry On Southwest

So, you’ve booked a Southwest flight. You’re thrilled about the two free checked bags, the open seating chaos, and the distinct possibility of a flight attendant telling a dad joke over the intercom. But then comes the dreaded packing moment: what the heck can you actually bring in your carry-on? Specifically, what will get you tackled by a nice, but very firm, TSA agent?

Let’s talk about the hard no’s. The stuff that will make your carry-on a crime scene.

The Liquid Soap Opera

First up: the 3-1-1 rule. It’s the airline equivalent of a strict HOA. You can bring liquids, gels, and aerosols, but only in containers that are 3.4 ounces (100 milliliters) or less. That’s it. No full-size shampoo, no giant bottle of ranch dressing for your pretzels.

Here’s the kicker: you have to fit all those tiny bottles into a single, quart-sized, clear zip-top bag. One bag. Not a “fancy designer tote” you bought in a duty-free shop. A baggie. If you try to sneak a full tube of toothpaste, you’re not saving the planet; you’re just making the TSA agent’s day slightly more amusing.

Surprising fact: Peanut butter counts as a liquid. That’s right. If you’re planning a mid-flight PB&J, your Jif is considered a spreadable menace. You can bring a 3.4-ounce jar, but don’t try to act like it’s a solid. The TSA knows your creamy ways.

Sharp Objects: The “No, You Can’t Bring a Samurai Sword” Section

Southwest is not a medieval reenactment society. You cannot bring a pocket knife, a Swiss Army knife, or that cool letter opener shaped like a dragon. These are considered weapons, and the gate agent will look at you with the disappointed face of a librarian who just caught you eating a sandwich over a rare book.

Liquid Allowed In Carry On Baggage at Edward Padgett blog

For some reason, you can bring a screwdriver. Wait, what? Yes, if the screwdriver is seven inches long or shorter, it’s totally fine. A tiny screwdriver? Travel-approved. A tiny knife? Straight to jail. The logic is basically “we trust you to fix a loose armrest, but not to harm a pretzel bag.”

This extends to scissors. If the blades are less than four inches from the pivot point, you’re good. If they’re bigger, they go in your checked bag. Or better yet, leave them at home; nobody is gaining altitude to do arts and crafts.

The Explosive No-No’s (Don’t be that Guy)

Let’s be obvious: explosives are a hard pass. No fireworks, no sparklers, no dynamite (yes, people have tried). Also, no blasting caps, which I only mention because apparently, some people have them in their garage and think, “Eh, the kids can play with these on the beach.”

But here’s the weird one: dry ice. You can actually bring dry ice, but only if it’s under 5.5 pounds per person and packed in a container that allows gas to vent. And you have to tell the airline. Don’t just smuggle a block of frozen CO2 in your backpack like you’re a mad scientist.

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Also, lithium batteries are fine in your devices, but loose ones? The loose lithium batteries are the party poopers. They’re a fire risk. So keep your batteries inside your laptop or camera. Don’t toss them in your bag like loose change.

The Weird Stuff That Will Get You Pulled Aside

Let’s talk about the “Why would you bring that?” category. Frozen gel packs? Only allowed if they’re fully frozen (solid, not slushy). Which means if you’re flying from a hot Tarmac and your ice pack starts melting, congrats, you’ve broken the law.

What about tools? I mentioned screwdrivers, but no hammers, crowbars, or saws. A wrench less than seven inches? Sure! A pipe wrench? That’s a heavy “no.” Because apparently, a small wrench is for fixing a toilet, and a big wrench is for fixing an air marshal’s face.

Sporting goods are also tricky. Baseball bats, golf clubs, and hockey sticks? Check them. You can’t bring a baseball bat in the cabin unless you plan to use it as a walking stick, and even then, only if you have a medical note. And no, your “emotional support baseball bat” doesn’t count.

Southwest Airlines Carry-On Policy: What You Need to Know!

The Surprising Things You CAN Bring

Now for the shocking part: you can bring a small dog, a cat, or a rabbit in the cabin (in an approved carrier). But you cannot bring a hamster. Seriously. Southwest says no to hamsters, guinea pigs, and ferrets. The logic? They’re “unclean.” Which is rich, considering the person next to you might be eating a tuna sandwich with their bare hands.

You can also bring a cake. A full, frosted cake. It’s technically a solid, so it’s fine. No joke. You can board with a three-tiered wedding cake and set it in your lap. The flight attendants will probably high-five you.

And my personal favorite: you can bring a human skull. For real. The TSA says a human skull is fine as long as it’s cleaned and not a crime scene souvenir. So if you’re a medical student or a very unique travel blogger, go for it. Just don’t make eye contact with the person next to you.

The Final, Unbreakable Rule

Above all, remember this: No common sense? Then your carry-on is a gamble. The best advice? Pack as if you’re going on a picnic in a library. No weapons, no explosives, no weird liquid science experiments. Your seatmate will thank you, and the TSA agent will only sigh—not tackle you. Happy flying!