Thinking about packing for your next Southwest Airlines adventure? You're in the right place! Understanding airline baggage policies can sometimes feel like trying to solve a Rubik's Cube blindfolded. But fear not, we're here to demystify "how many oz can you take on Southwest Airlines" and ensure your packing is a breeze.
Let's dive into the specifics, step by step, so you can pack smart and travel stress-free.
Step 1: Engage Your Inner Packing Pro!
Before we even talk numbers, let's think about your travel style. Are you a minimalist, living out of a small backpack, or do you believe in bringing all the options, just in case? Understanding your typical packing habits will help you apply these rules effectively. Are you ready to optimize your luggage and potentially save some cash? Let's get started!
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| How Many Oz Can You Take On Southwest Airlines |
Step 2: Understanding the "Ounce" Context
When people ask "how many oz can you take on Southwest Airlines," they're usually referring to two main things:
Liquids in Carry-On Bags (TSA 3-1-1 Rule): This is where ounces (specifically fluid ounces) come into play the most.
Weight of Checked Bags: While typically measured in pounds, we can convert to ounces for a more granular understanding, though it's less common for this purpose.
Let's break down each one.
Sub-heading: Liquids in Your Carry-On - The TSA 3-1-1 Rule
This is the most common place where "ounces" are a critical measurement. Southwest Airlines, like all airlines operating in the US, adheres to the Transportation Security Administration's (TSA) 3-1-1 rule for liquids, aerosols, gels, creams, and pastes in carry-on baggage.
What it means: Each passenger is allowed to carry liquids, gels, and aerosols in travel-size containers that are 3.4 ounces (100 milliliters) or less per item.
The "1" in 3-1-1: All these travel-sized containers must fit comfortably into one clear, quart-sized bag. Think of a standard Ziploc sandwich bag – that's roughly a quart size.
The other "1" in 3-1-1: You are limited to one such quart-sized bag per passenger.
Important Note: This rule applies to items like:
Shampoo, conditioner, lotions
Toothpaste, mouthwash
Gels (e.g., hair gel, hand sanitizer gel)
Aerosols (e.g., hairspray, deodorant spray)
Creams (e.g., sunscreen, moisturizer)
Tip: Write down what you learned.
Sub-heading: Exceptions to the 3-1-1 Rule for Carry-On Liquids
There are crucial exceptions to the 3-1-1 rule for medically necessary liquids and baby items. These do not need to fit into your quart-sized bag and can be carried in larger quantities:
Medically Necessary Liquids: This includes things like insulin, other essential liquid medications, and breast milk, formula, and toddler drinks. You should declare these items to TSA officers for inspection.
Baby Food: Baby/toddler food, including puree pouches, in quantities greater than 3.4 ounces are also permitted.
Tip: While not always required, it's a good idea to have a doctor's note for prescription medications, especially if they are in larger quantities.
Step 3: Understanding Checked Baggage Weight (Pounds, Not Ounces!)
While the initial question uses "ounces," it's crucial to understand that checked baggage limits are almost universally measured in pounds (lbs), not ounces, by airlines. However, for a sense of scale, let's briefly acknowledge the conversion (). So, if a bag weighs 50 lbs, that's . But trust us, you'll be thinking in pounds for checked bags!
Sub-heading: Southwest's Checked Baggage Policy
Southwest Airlines has a very competitive checked baggage policy, though it has seen some changes recently. As of May 28, 2025, the policy for free checked bags has been adjusted.
General Policy (for most passengers booking on or after May 28, 2025):
First checked bag: A fee of $35 will apply.
Second checked bag: A fee of $45 will apply.
Third+ checked bags: A fee of $150 per bag will apply.
Maximum Weight per Checked Bag: Each checked bag generally must not exceed 50 lbs (22.7 kg).
If your bag is between 51 and 70 lbs: An overweight fee of $100 applies.
If your bag is between 71 and 100 lbs: An overweight fee of $200 applies.
Bags exceeding 100 lbs will not be accepted as checked baggage and may need to be shipped via cargo.
Maximum Size per Checked Bag: Each checked bag must not exceed 62 linear inches (length + width + height).
If your bag is larger than 62 linear inches but not more than 80 inches: An oversize fee of $200 applies.
If a bag is both overweight AND oversized, only one $200 charge will apply (as long as it doesn't exceed 100 lbs total).
Sub-heading: Who Still Gets Free Checked Bags on Southwest?
While the general policy has shifted, some passengers still enjoy the benefit of free checked bags:
Business Select Fares: Passengers who purchase Business Select tickets typically receive two free checked bags.
Rapid Rewards A-List Preferred Members: These elite status holders also receive two free checked bags.
Rapid Rewards A-List Members: These members typically receive one free checked bag.
Southwest Rapid Rewards Credit Cardholders: Many Southwest co-branded credit cards offer one free checked bag as a perk.
Active Duty Military Passengers: With a current, valid military ID, active duty military personnel are exempt from the two-piece baggage limit and will not be subject to excess, oversize, or overweight baggage charges, provided bags do not exceed 100 pounds in weight and 80 inches in size.
Tip: Read carefully — skimming skips meaning.
Step 4: Carry-On Bag and Personal Item Dimensions (No Ounce Limit Here!)
For carry-on bags and personal items, Southwest Airlines focuses on dimensions rather than weight. There is no specified weight restriction for carry-on items.
Sub-heading: Carry-On Bag Dimensions
You are allowed one carry-on bag per passenger. This bag should fit in the overhead bin.
Maximum Dimensions: 24" (L) x 16" (W) x 10" (H) (including handles and wheels).
Sub-heading: Personal Item Dimensions
In addition to your carry-on, you are also allowed one personal item. This item must fit under the seat in front of you.
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Maximum Dimensions: 18.5" (L) x 13.5" (W) x 8.5" (H). This typically includes items like a purse, briefcase, laptop bag, small backpack, or camera bag.
Sub-heading: Additional Carry-On Items That Don't Count
Southwest allows certain items in addition to your standard carry-on and personal item, which is a great perk! These include:
A child restraint device (car seat) for a ticketed child or when complimentary, available space exists.
Assistive/mobility devices for individuals with disabilities (no limit on number).
Outer garments (e.g., coats, jackets).
Food for consumption during the flight in disposable packaging.
Walking canes or umbrellas.
Breast pumps, milk/formula, and diaper bags for infants.
Step 5: Prohibited Items (No Ounce Limit, Just Don't Bring Them!)
QuickTip: Note key words you want to remember.
While not directly related to ounces, it's essential to be aware of items that are completely prohibited on Southwest flights, or have specific restrictions. This avoids delays and potential issues.
Hazardous Materials: This is a broad category, but includes explosives, compressed gases, flammable liquids and solids, oxidizers, poisons, corrosives, and radioactive materials. Think paints, lighter fluid, fireworks, tear gases, oxygen bottles (unless medically necessary and properly secured/declared).
Lithium Batteries: Spare lithium batteries and portable chargers/power banks must be in your carry-on bag. They are not allowed in checked luggage due to fire risk. Each battery should be protected from short circuits (e.g., by insulating terminals).
E-cigarettes/Vaping Devices: These are allowed in carry-on baggage only and cannot be used or recharged on board.
Firearms and Ammunition: Must be unloaded, declared to the airline, and transported in a locked, hard-sided container as checked baggage only. Specific rules apply.
Sharp Objects: Blades, knives, razors (unless specifically travel-safe), and other sharp objects are generally prohibited in carry-on and should be packed in checked baggage with proper sheathing.
Self-Defense Items: Items like pepper spray are generally prohibited in carry-on bags and may have restrictions in checked bags.
Alcoholic Beverages: Alcoholic beverages with more than 70% alcohol (140 proof) are not allowed. Beverages with 24%-70% alcohol are limited to 5 liters per passenger in checked bags (in unopened retail packaging). Mini bottles in carry-on must follow the 3-1-1 liquid rule.
Always check the TSA website for the most up-to-date and comprehensive list of prohibited items.
Step 6: Pre-Flight Checklist and Smart Packing Tips
To ensure a smooth journey and avoid any "ounce" or weight-related surprises:
Measure and Weigh: Before you leave for the airport, weigh your checked bags with a luggage scale and measure their dimensions. Do the same for your carry-on and personal item to ensure they meet the size requirements.
Utilize Packing Cubes: These are a game-changer for organizing your carry-on and maximizing space, helping you adhere to dimensions.
Travel-Sized Toiletries: Invest in reusable travel-sized containers for your liquids to comply with the 3-1-1 rule.
Wear Heavier Items: If you're close to a weight limit for checked bags, consider wearing your heaviest shoes or jacket on the plane.
Consolidate Liquids: If traveling with someone, coordinate to fit all your 3-1-1 liquids into one quart-sized bag if possible, or ensure each person has their own.
Check Your Fare Type: Reconfirm your specific fare type or Rapid Rewards status to understand your exact free checked bag allowance, especially for flights booked on or after May 28, 2025.
By following these steps, you'll be well-prepared to navigate Southwest Airlines' baggage policies, whether you're thinking in ounces, pounds, or inches!
10 Related FAQ Questions
How to pack liquids in my carry-on for Southwest Airlines?
Pack all liquids, aerosols, gels, creams, and pastes in containers of 3.4 ounces (100 milliliters) or less. Place all these containers in a single, clear, quart-sized bag, and limit yourself to one such bag per passenger.
How to avoid checked bag fees on Southwest Airlines?
Travel with only a carry-on and personal item that meet size requirements. If you need to check bags, consider booking Business Select fares, earning A-List or A-List Preferred status, or using a Southwest Rapid Rewards credit card, as these may offer free checked bag allowances. Active duty military also gets free bags.
QuickTip: Highlight useful points as you read.
How to know if my carry-on bag is the right size for Southwest Airlines?
Measure your carry-on bag, including wheels and handles. It should not exceed 24 inches (L) x 16 inches (W) x 10 inches (H).
How to deal with overweight checked baggage on Southwest Airlines?
If your checked bag weighs between 51-70 lbs, you'll incur a $100 overweight fee. For 71-100 lbs, it's a $200 fee. To avoid this, repack items into another bag or remove some items to reduce the weight before checking in. Bags over 100 lbs are not accepted.
How to travel with medical liquids on Southwest Airlines?
Medically necessary liquids, such as prescription medications, breast milk, or formula, are exempt from the 3-1-1 rule. You can carry them in quantities larger than 3.4 ounces. Inform TSA officers about these items during the security screening process.
How to bring a personal item on Southwest Airlines?
Your personal item (e.g., purse, laptop bag, small backpack) must fit under the seat in front of you and should not exceed 18.5 inches (L) x 13.5 inches (W) x 8.5 inches (H).
How to check if Southwest Airlines has changed its baggage policy?
Always refer to the official Southwest Airlines website's "Baggage" or "Optional Travel Charges" section for the most current and detailed information on their policies, as they can change.
How to pack toiletries to comply with TSA rules for Southwest?
Purchase travel-sized toiletries (3.4 oz or less), or transfer larger products into smaller, reusable containers. Place them all in a single, transparent, quart-sized bag.
How to ensure my checked bag isn't oversized for Southwest?
Measure the total linear inches (length + width + height) of your checked bag. It should not exceed 62 linear inches. Bags between 63-80 inches will incur a $200 oversized fee.
How to pack electronic devices and batteries for a Southwest flight?
Laptops, tablets, and mobile phones can be in either carry-on or checked bags. However, spare lithium batteries, portable chargers, and e-cigarettes must be in your carry-on bag and protected from short circuits.
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