Whether you're flying from JFK to Paris, or LAX to Rome, understanding the nuances of EU carry-on rules is crucial for a smooth and stress-free journey for anyone traveling from the US for work.
This guide will provide you with everything you need to know about European carry-on regulations, from standard dimensions and weight limits, to airline-specific policies and expert tips that will make your experience of traveling to Europe for work simpler.
Standard EU carry-on size allowance
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There isn't a single, universal carry-on size for the entire European Union, but most major airlines have adopted a general standard. When traveling for work, aim for a carry-on bag that is no larger than 21.5 x 15.7 x 7.9 inches (approximately 55 x 40 x 20 cm).
It's important to note that these dimensions often include wheels and handles, so be sure to measure your bag accurately. Despite no longer being part of the European Union, these dimensions are also a good indicator for UK travel.
While this size is a good rule of thumb, it's always best to check the specific carry-on allowance of the airline you're flying with, as some may have slightly different restrictions.
There are no unusual exceptions, but it’s also important to be aware of items that are not allowed in carry-on baggage on an EU flight:
Sharp objects e.g. knives, scissors, tools
Inflammable items e.g. aerosol cans, fireworks
Weapons of any kind.
European vs. US carry-on sizes
A key point of confusion for many US travelers is the difference between European and American carry-on size allowances.
Generally, US airlines like Delta and United are more generous. For example, American Airlines allows a standard carry-on size of 22 x 14 x 9 inches (56 x 36 x 23 cm). This means that a carry-on bag that would typically be acceptable for domestic US travel is likely to be too large for a European flight.
Carry-on weight and liquid allowances
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How much should your carry-on weigh?
Most European airlines have a weight limit for carry-on baggage, typically no more than 8-10 kg (approximately 22 lbs). By having specified weight limits, even unusual carry-on items should fit comfortably into overhead compartments, making boarding quicker and easier. Weight limits are often strictly enforced, so be sure to weigh your bag before heading to the airport.
After multiple cases of budget airlines charging large fees for additional hand luggage, the EU proposed new rules in June 2025 that would allow each passenger one cabin bag measuring up to 100cm and a personal item on any flight without additional charge. Once approved by a majority of EU member states, this proposal is expected to become law and apply to all flights within the EU and any routes that begin or end in the EU.
What counts as a personal item on European flights?
Personal items are allowed on European flights in addition to carry-on baggage. The general rule is that they must be small enough to fit under the seat in front of you, with maximum dimensions of 15.7 x 11.8 x 5.9 inches (40 x 30 x 15cm). Anything larger will have to be checked.
If you are unsure, check with your airline about what is considered a personal item before traveling to avoid unexpected additional fees.
Personal times could include:
Coats or jackets
Laptop bags
Small backpacks
Diaper bags
Handbags
Note: While this size limit is standard, airlines may have their own rules, especially if you fly with a budget airline.
Understanding liquid allowances
All liquids must be in containers of no more than 100ml (3.4 ounces), and all of these containers must fit into a single, transparent, resealable plastic bag with a capacity of no more than one litre.
For US travelers, this process will feel familiar, as it's nearly identical to the TSA’s 3-1-1 rule for domestic flights:
3: Containers of 3.4 ounces (100 milliliters) or less.
1: All containers must fit into a clear, resealable plastic bag.
1: One bag per person.
While some airports have new scanning technology that allows them to relax the 100ml limit, the EU introduced standardized rules in September 2024 to make security detection consistent across all airports and to avoid confusion until the new technology is available everywhere.
Tips for business travelers
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When traveling for work, efficiency is very important. Avoiding delays and getting to your destination fresh and focused can make a big difference to how successful your trip is. Here are some of our top tips to help you and your team pack smarter.
Invest in a modern carry-on bag
Finding a carry-on bag that meets size requirements is one thing, but it’s also important that it’s secure and accessible so you have easy access to your laptop and notebooks. Look for soft shell bags, as these will provide protection, but also flexibility in tight spaces. Padded laptop compartments and built-in USB ports are also great additions.
Plan based on the strictest airline policy
If your European trip includes multiple flights, there is a good chance you will be flying with more than one airline. Even if you fly into Europe with a US airline like United, your connecting flight to another city might be on a partner airline that is subject to the stricter European carry-on rules.
To be safe, always pack according to the strictest airline policy to avoid delays, additional fees, or having to unexpectedly check your bags.
Keep the essentials with you
Lost baggage could turn from an inconvenience to a disaster if your laptop or work phone were to be in your checked baggage. Always keep important documents and devices in your carry-on baggage.
Keep your receipts
Even with careful planning, you may be unlucky and still end up having to pay for a carry-on to be checked. If this happens, make sure you get a detailed receipt, as this is a legitimate travel expense that Perk users can easily upload and manage on the go.
Benefit from business class
Carry-on allowance can change based on your booking. Business and First class tickets almost always include a more generous allowance, often permitting an additional item or a higher weight limit.
Frequent flyers can often secure loyalty benefits, including priority boarding or additional baggage allowance, so check your points before you pack.
Carry-on regulations for major European airlines
The following table shows limits for business class on major airlines and standard limits for budget airlines that do not offer different ticket classes.
Note: Carry-on allowances will vary based on the type of ticket booked. Speak to your airline for more detailed information and options for purchasing additional baggage allowance.
Key takeaways for your next European business trip
Standardized regulations in the EU mean that US business travelers will need to pack and prepare slightly differently from how they would for flights in the US. But once you are familiar with the regulations, frequent work travel to and from any EU nation will be much easier.
While the individual’s experience will be smoother, managing work travel for a group across multiple airlines remains a complex task. That’s where Perk can help by centralizing your company's travel management and integrating your travel policies, itineraries, and expenses. Book a demo to see how Perk can simplify travel management for your business.