The New Airline and TSA Carry-On Size & Guidelines

Flying to your cruise port can feel more complicated than it used to. Between stricter airline enforcement, changing fare types, and ongoing confusion around TSA rules, many travelers are unsure what actually counts as an approved carry-on. Understanding today’s airline and TSA carry-on rules can make a real difference when you are flying to a cruise. With the right preparation, travelers can avoid gate-checked bags, late embarkation arrival, and unnecessary stress before sailing with Norwegian Cruise Line.

This guide breaks down TSA’s regulations, how airline carry-on size rules differ by carrier, 2026 policy changes, and why luggage rules often feel easier once your cruise begins.

One of the most common travel misconceptions is that TSA sets carry-on size limits. The truth is, TSA does not decide the restrictions on carry-on bag sizes. Their role is focused on security, and the airlines themselves control whether your bag is allowed on the aircraft due to size restrictions.

For cruise travelers flying into port cities, this can be a real issue. A delayed or gate-checked bag can quickly turn into a problem if you are boarding the ship the same day.

There isn’t one universal TSA carry-on size, and TSA does not publish standard carry-on dimensions. Bag size is ultimately determined by the airline. TSA’s job is to screen what you’re bringing through security.

What TSA does care about is whether your carry-on can be screened safely and whether what’s inside follows TSA guidelines, including liquids and prohibited items.

• TSA allows carry-on bags based on whether the items inside meet security rules and can be screened.
• Your TSA carry-on bag size allowed is ultimately determined by your airline, not TSA.
• A bag can clear TSA screening and still be stopped at the gate if it does not meet airline carry-on size rules or if overhead bin space is limited.

TSA’s primary concern is safety. If a bag is screened and does not contain any prohibited items, it will pass through security regardless of its size. This is why travelers often clear TSA without issue but can later be required to check their bag at the gate before boarding

Liquids are highly regulated, and TSA’s rules are clear, strict, and consistently enforced. If you are packing liquids in a carry-on or personal item, every traveler is required to follow the TSA 3-1-1 rule.

The rule requires:

• Liquids, gels, and aerosols must be 3.4 ounces or smaller per container

• All liquid containers must fit inside one quart-sized, clear bag 

• Each passenger is limited to one liquids bag

Cruise travelers frequently run into issues with items such as sunscreen, skincare products, hair products, and alcohol. While many of these items are allowed on board cruise ships, they may be confiscated at airport security if they exceed TSA limits.

There are a few additional carry-on guidelines that can affect cruise travelers flying to port.

• Electronics, such as laptops and tablets, may need to be removed from bags for screening.
• Medications and medical devices are permitted and should be packed in carry-ons.
• Solid food items, including snacks for embarkation day, are generally allowed through airport security.

Being aware of these TSA guidelines can help travelers prepare for airport screenings before transitioning to cruise embarkation requirements.

Airlines enforce carry-on size rules more strictly than TSA, especially at boarding. Airline carry-on size policies vary by carrier, aircraft type, and fare class. These differences are where most cruise travelers encounter problems. Please remember to always check your airline's website for official carry-on and bag size regulations.

American Airlines allows one carry-on bag and one personal item per passenger.

• Maximum carry-on size: 22 x 14 x 9 inches
• Personal items must fit under the seat in front of you

Delta allows one carry-on bag and one personal item per passenger.

• Maximum carry-on size: 22 x 14 x 9 inches.
• The combined length, width, and height of the bag must add up to no more than 45 linear inches.
• Personal items must be able to fit under the seat in front of you

United Airlines allows carry-on bags up to 22 x 14 x 9 inches.

• One personal item is also permitted.
• Basic Economy fares may restrict carry-ons on certain routes.

Southwest Airlines offers one of the most generous carry-on policies among U.S. carriers.

• Maximum carry-on size: 24 x 16 x 10 inches.
• One personal item is included.

JetBlue allows carry-on bags up to 22 x 14 x 9 inches.

• Personal items cannot exceed 17 x 13 x 8 inches.
• All JetBlue fares, including Blue Basic, allow one full-size carry-on bag.

United Airlines allows carry-on bags up to 22 x 14 x 9 inches.

• One personal item is also permitted.
• Basic Economy fares may restrict carry-ons on certain routes.

Airlines are expected to continue tightening carry-on enforcement heading into 2026. Higher passenger volume and increased competition for overhead bin space are a big reason for these changes.

There are several factors influencing stricter airline policies. Some of these factors include:

• Higher load factors and fuller flights

• Overhead bin space is limited, especially on narrow-body and regional aircrafts

• Checked baggage fees have made carry-on enforcement a bigger revenue driver for airlines 

As these policies are being enforced, travelers flying to cruise ports are more likely to run into bag sizing at the gate and, as a result, costly gate checks.

As airlines continue with carry-on enforcement, cruise travelers are likely to see a few clear trends become more common:

• More frequent bag sizing at boarding gates, especially on full flights

• Fewer exceptions for oversized carry-ons

• Greater scrutiny on short-haul and regional routes, which often serve cruise ports 

With these changes, keeping carry on restrictions in mind while planning travel to your cruise port is now more important than ever.