TSA Carry-On Size: The Complete Guide to Luggage Regulations

Table of Contents:

• Understanding TSA Carry-On Size Requirements
• Standard Dimensions for Carry-On Luggage
• TSA's Role in Carry-On Regulations
• Airline-Specific Carry-On Size Limitations
• Personal Items vs. Carry-On Bags
• Measuring Your Carry-On Correctly
• Carry-On Weight Restrictions
• Common Questions About TSA Carry-On Rules
• Choosing the Right Carry-On Bag
• FAQ: Directly Answered Questions
• FAQ: Additional Carry-On Questions

Understanding TSA Carry-On Size Requirements

Have you ever stood at the airport check-in counter, watching nervously as the agent eyes your carry-on bag? I've been there many times myself. Once, I even had to unpack my suitcase right in the terminal, frantically stuffing items into my pockets while other travelers watched. That experience taught me a valuable lesson about carry-on luggage sizes.

The standard carry-on bag size that most U.S. airlines accept is 22" x 14" x 9" (length, width, height). This includes wheels and handles, not just the main storage section of your bag. For air travel within the United States, these dimensions will generally keep you in the clear with most major airlines.

Standard Dimensions for Carry-On Luggage

When planning your next trip, it helps to know what size bag you can bring on the plane. For most domestic flights in the United States, the magic numbers are:

• Length: 22 inches (56 cm)
• Width: 14 inches (36 cm)
• Height: 9 inches (23 cm)

These measurements create a total of 45 linear inches when added together, which is another way some airlines express their size limits. Remember that wheels, handles, and outer pockets count toward these limits!

Airline-Specific Carry-On Size Limitations

While many U.S. carriers have standardized their requirements, there are notable exceptions:

Southwest Airlines currently has the most generous policy, allowing carry-on bags up to 24" x 16" x 10". This gives travelers about 30% more packing space compared to the standard dimensions.

Allegiant Airlines recently increased their carry-on size limits to 22" x 16" x 10", bucking the trend of airlines getting stricter with size policies.

Personal Items vs. Carry-On Bags

Most airlines allow passengers to bring one carry-on bag plus one personal item. Your personal item must fit under the seat in front of you, while your main carry-on goes in the overhead bin.

Common personal items include:

• Purses
• Laptop bags
• Small Venture Slim Backpack
• Briefcases
• Camera bags

The typical size limit for personal items is around 18" x 14" x 8", though this varies by airline. This two-bag allowance helps you maximize packing space while keeping essentials accessible during the flight.

Measuring Your Carry-On Correctly

To avoid surprises at the airport, measure your luggage properly:

1. Include wheels and handles in your measurements
2. Measure at the widest points of the bag
3. Account for any expansion features that might increase dimensions
4. Use a tape measure to check length, width, and height

Don't assume luggage marketed as "carry-on" will automatically meet current size restrictions. Many bags sold online exceed the standard guidelines, sometimes by several inches.

Carry-On Weight Restrictions

Beyond size dimensions, many airlines impose weight limits for carry-on luggage. While domestic U.S. carriers typically focus more on size than weight, international airlines often enforce strict weight restrictions.

Typical weight limits include:

• Domestic U.S. flights: 15-40 pounds (rarely enforced)
• European airlines: 15-26 pounds (strictly enforced)
• Asian carriers: 15-22 pounds (strictly enforced)

International travelers should consider the Duravo Expandable International Carry-On, which weighs just 5 pounds empty, giving you more weight allowance for your belongings.

Common Questions About TSA Carry-On Rules

Can I Bring Liquids in My Carry-On?

Yes, but with restrictions. TSA enforces the 3-1-1 rule for liquids in carry-on bags:

• 3.4-ounce (100ml) containers or smaller
• 1 quart-sized, clear, plastic, zip-top bag
• 1 bag per passenger

All liquids, gels, creams, pastes, and aerosols must comply with this rule, including items like toothpaste, shampoo, and lotion.

What Items Are Restricted in Carry-On Bags?

Several items are prohibited or restricted in carry-on luggage:

• Sharp objects (knives, scissors with blades longer than 4 inches)
• Firearms and ammunition
• Baseball bats, golf clubs, and similar sporting equipment
• Tools longer than 7 inches
• Liquids over 3.4 ounces

For a complete list of restricted items, check the TSA website.

Choosing the Right Carry-On Bag

When selecting a carry-on bag for air travel, consider these factors:

1. Precise dimensions that comply with airline standards
2. Quality wheels that move smoothly and quietly
3. Durable materials like polycarbonate for hard shells or ballistic nylon for soft sides
4. Interior organization features like compression straps and dividers
5. Lightweight construction for international travel with weight restrictions

The Duravo Front Pocket Carry-on combines all these features with a convenient front pocket for your laptop and travel documents.

FAQ: Additional Carry-on Questions

What size luggage is allowed for carry-on?

For most domestic U.S. airlines, the standard carry-on size is 22" x 14" x 9" (length, width, height). I've found this to be the most universally accepted size that will keep you out of trouble at the gate. Remember that these measurements include your wheels and handles! I always recommend measuring your bag from its furthest points to avoid any surprises at the airport. Some airlines like Southwest are more generous (allowing up to 24" x 16" x 10"), while international carriers often have stricter requirements. Always check your specific airline's website before flying, as these requirements can change without notice.

What is the most accepted carry-on size?

The gold standard for carry-on luggage in the United States is 22" x 14" x 9". This is what I call the "safe zone" - if your bag fits within these dimensions, you'll likely be fine on American Airlines, Delta, United, and JetBlue. These dimensions have become the industry standard after "the big three" (American, Delta, and United) all standardized their requirements. It's worth noting that these measurements must include any external parts like wheels and handles, not just the main storage compartment. When I'm purchasing new luggage, I always look for bags marketed as "airline compliant" but still verify the actual dimensions rather than trusting the label.

What is the TSA approved carry-on size?

This is actually a common misconception I hear all the time! The TSA (Transportation Security Administration) doesn't actually set or enforce luggage size limits - that's entirely up to the individual airlines. The TSA's role is focused on security screening protocols and enforcing rules like the 3-1-1 liquid restrictions. However, if your bag is too large to fit through their scanning equipment, TSA agents might direct you back to the airline counter to check it. While many people refer to the standard 22" x 14" x 9" as the "TSA approved size," it's really the airlines that determine and enforce these dimensions at the gate or check-in counter.

Can a 24 inch luggage be a carry-on?

It depends on which airline you're flying! For most major U.S. carriers like American, Delta, and United, a 24-inch suitcase would exceed their 22-inch length restriction and likely need to be checked. However, Southwest Airlines currently allows carry-ons up to 24" x 16" x 10", so your 24-inch bag would be acceptable there. In my experience, some gate agents might let slightly oversized bags slide on less crowded flights, but I wouldn't recommend counting on this leniency - especially as airlines become stricter about enforcing their policies. If you primarily fly Southwest, a 24-inch bag could work as a carry-on, but it lacks versatility for other airlines.

What are the dimensions of a carry-on bag?

The standard dimensions for carry-on bags across most U.S. airlines are 22 inches in length, 14 inches in width, and 9 inches in height (22" x 14" x 9"). These measurements should include any external parts like wheels, handles, and pockets. Some airlines also use a "linear inch" measurement, which is the sum of all three dimensions - for standard carry-ons, this equals 45 inches. I always recommend measuring your bag at its widest points to ensure compliance. Different airlines may have slight variations in their requirements, with Southwest being notably more generous at 24" x 16" x 10" and some international carriers being more restrictive.

How are carry-on dimensions measured?

This is important to understand! Carry-on dimensions are measured at the widest points of your bag, including wheels, handles, side pockets, and any other protruding parts. Many travelers make the mistake of only measuring the main compartment, but airlines consider the total external dimensions. I recommend using a tape measure to check the length (from wheel to wheel), width (side to side at the widest point), and height (from bottom to top, including handles) of your bag. Some airports have sizing bins or frames at check-in or at the gate where you must place your bag to prove it fits within the allowed dimensions. If it doesn't fit in the sizing device, you may be required to check it.

What are carry-on weight restrictions?

While domestic U.S. airlines typically focus more on size than weight for carry-ons, many do have weight restrictions ranging from 15-40 pounds. In my experience, U.S. carriers rarely weigh carry-on bags unless they appear obviously heavy, but international airlines are much stricter about enforcing weight limits. For example, many European and Asian carriers limit carry-ons to around 15-22 pounds and actually weigh them at check-in. This is an area where travelers often get surprised, especially when flying internationally. I always recommend checking both size AND weight restrictions before packing, and if you're flying internationally, consider bringing a portable luggage scale to avoid surprises at the airport.

Is toothpaste considered a liquid by TSA?

Yes, toothpaste is considered a liquid under TSA regulations. I've had to explain this to countless travelers who are surprised when their toothpaste gets flagged at security. The TSA follows the 3-1-1 rule for liquids, which means your toothpaste tube must be 3.4 ounces (100ml) or smaller and placed inside your single quart-sized clear plastic bag along with your other liquids, gels, and aerosols. This includes items that might not seem like liquids but are treated as such – toothpaste, creams, gels, and even peanut butter. I recommend buying travel-sized toothpaste or transferring some to a smaller container if you're only bringing carry-on luggage.

Can I take a 22.5 inch carry-on bag?

This is a common question that causes confusion. If your bag is 22.5 inches long and the airline limit is 22 inches, you're technically exceeding the size restriction by half an inch. Based on my experience, some airlines may let this small difference slide, particularly on less crowded flights, but others might be extremely strict—especially budget carriers and international airlines. The enforcement often depends on the airline, how full the flight is, and sometimes even the mood of the gate agent. If you frequently fly on airlines with a 22-inch limit, I'd recommend playing it safe and getting a bag that fully complies with regulations to avoid any potential issues or unexpected gate check fees.

What are the new rules for carry-on luggage?

The carry-on landscape has been evolving, with several notable changes in recent years. Many major U.S. carriers have standardized their carry-on dimensions to 22" x 14" x 9", down from previous larger allowances. Budget airlines have introduced stricter enforcement and sometimes additional fees for carry-ons larger than a personal item. With planes flying fuller than ever, airlines are enforcing size restrictions more consistently. Electronic devices larger than cell phones typically need to be removed from bags for separate screening, though TSA PreCheck members may be exempt. Additionally, many international carriers now have weight restrictions for carry-ons, often around 15-22 pounds. I always recommend checking your specific airline's website before each trip, as these rules continue to change regularly.

Is hard or soft luggage better for carry-on?

This is largely a matter of personal preference, but there are pros and cons to each that I've discovered through years of travel. Hard-shell luggage offers better protection for fragile items and electronics, usually has a more structured shape that maintains its dimensions (important for size restrictions), and tends to be more water-resistant. However, hard cases can't expand, may crack under extreme pressure, and don't have external pockets. Soft-sided luggage is typically lighter, has helpful external pockets for quick access to items like documents or electronics, and usually offers some flexibility for squeezing in a bit more or fitting into tight overhead spaces. The downside is less protection for contents and potentially less durability. Consider your travel habits and priorities when choosing between the two.

What brand of carry-on luggage is best?

While I can't recommend specific brands as "best" since each traveler has different needs and budgets, I can share what features to look for. Quality spinner wheels that move smoothly and quietly are essential for navigating airports. A sturdy telescoping handle that doesn't wobble will make a huge difference in maneuverability. Durable materials like polycarbonate for hard shells or ballistic nylon for soft sides will extend your luggage's lifespan. Interior organization features like compression straps, dividers, and pockets help maximize packing efficiency. If you travel internationally, lightweight construction is crucial to meet weight restrictions. And of course, precise dimensions that comply with airline standards are non-negotiable. Consider your travel frequency, typical trip length, and budget when investing in carry-on luggage.

What if my carry-on is 1 inch too big?

If your carry-on exceeds the airline's dimension limits by 1 inch, you're taking a calculated risk. From my experience, enforcement varies widely. On less crowded flights or at less busy airports, that extra inch might go unnoticed, especially if your bag isn't obviously oversized. However, on full flights or with airlines known for strict enforcement (particularly budget and international carriers), you might be asked to gate-check your bag and potentially pay a fee. Some airlines use sizing bins at the gate, and if your bag doesn't fit, there's no wiggle room for negotiation. The safest approach is always to comply with the published dimensions, but if you already own a slightly oversized bag, try not to overstuff it, which makes the excess size more noticeable.

Can you have a carry-on and a backpack?

Yes, most airlines allow one carry-on bag plus one personal item. Your backpack can count as either, depending on its size. A standard backpack (like a typical school or day backpack) usually qualifies as a personal item that goes under the seat in front of you, allowing you to also bring a rolling carry-on for the overhead bin. Larger travel backpacks might count as your main carry-on item instead. The personal item allowance is typically described as a "purse, briefcase, laptop bag, or small backpack" that can fit under the seat, with dimensions around 18" x 14" x 8" (though this varies by airline). I've found this two-bag allowance extremely useful for maximizing packing space while keeping essentials easily accessible during the flight.

How strict is TSA on carry-on size?

It's important to understand that TSA (Transportation Security Administration) doesn't actually enforce carry-on size restrictions – that's the airlines' responsibility. TSA is concerned with security screening, not luggage dimensions. The confusion arises because TSA checkpoints are where your bags are most thoroughly examined. If your bag is too large to fit through the X-ray machine, a TSA agent might refer you back to the airline, but they won't measure your bag or enforce airline size policies. The real enforcement happens at the gate or check-in counter with airline personnel. That said, extremely oversized bags might cause issues at security if they can't fit through screening equipment, so it's still important to stay within reasonable size limits.

Does deodorant count as a liquid TSA?

This depends on the type of deodorant. Stick deodorants (solid) are not considered liquids by TSA and can be packed in your carry-on without size restrictions and don't need to go in your liquids bag. However, gel, spray, roll-on, or cream deodorants are considered liquids and must follow the 3-1-1 rule: containers of 3.4 ounces (100ml) or less, all fitting in one quart-sized clear plastic bag, with one bag per passenger. I always recommend stick deodorant for carry-on travel to avoid using up precious space in your limited liquids bag. If you're unsure which category your specific deodorant falls into, check the consistency – if it's solid all the way through, it's generally exempt from liquid restrictions.

Does a backpack count as a carry-on?

Yes, a backpack can count as your carry-on, but whether it's your main carry-on or your personal item depends on its size. Most airlines allow one carry-on bag (to go in the overhead bin) plus one personal item (to go under the seat in front of you). A larger travel backpack (typically 35-45 liters) would count as your main carry-on, meaning you couldn't also bring a rolling suitcase unless you checked one of them. A smaller backpack (school-sized or day pack, typically under 30 liters) would usually count as your personal item, allowing you to also bring a standard carry-on suitcase. I often travel with a rolling carry-on plus a moderately sized backpack as my personal item, which gives me plenty of packing space while keeping essentials accessible during the flight.