When preparing for air travel, one of the most important things to consider is your luggage especially your carry-on bag. However, not all carry-ons are created equal. There are key differences between international and domestic carry-on sizes, and understanding these differences can save you time, money, and frustration at the airport.
What Is a Carry-On Bag?
A carry-on is a small piece of luggage that passengers are allowed to bring onboard the aircraft and store in the overhead bin or under the seat in front of them. It typically contains essentials like travel documents, electronics, a change of clothes, toiletries, and other personal items.
Airlines have strict size and weight limits for carry-ons — and these vary depending on whether you’re flying domestically or internationally.
Key Differences Between International and Domestic Carry-Ons
1. Size Dimensions
- Domestic Carry-On Size (U.S. Standards)
Most U.S.-based airlines allow carry-ons up to:
22 x 14 x 9 inches (56 x 36 x 23 cm), including wheels and handles. - International Carry-On Size
International airlines, especially budget carriers in Europe and Asia, often have stricter size limits. A common international size is:
21.5 x 13.5 x 7.5 inches (55 x 35 x 20 cm), though it can vary slightly between airlines.
Tip: Always check the airline’s official website for updated baggage size policies before flying.
2. Weight Restrictions
- Domestic Flights (U.S.)
Most U.S. airlines focus more on size than weight. In fact, many don’t specify a weight limit for carry-ons, though you must be able to lift it into the overhead bin unassisted. - International Flights
Many international carriers enforce strict weight limits, typically ranging from 15 to 22 pounds (7 to 10 kg). Your bag may be weighed at the gate or check-in counter.
3. Cabin Space Considerations
International flights often use smaller planes on short-haul or regional routes, especially within Europe or Asia. These aircraft have limited overhead bin space, which is why smaller carry-ons are preferred — and sometimes required.
In contrast, U.S. domestic flights tend to use larger aircraft, even for short routes, allowing for slightly larger bags in the cabin.
4. Airline Policies
- U.S. Domestic Carriers (e.g., Delta, United, American)
Tend to be more lenient with carry-on size and weight. Most allow one carry-on and one personal item (like a backpack or purse) free of charge. - International Carriers (e.g., Lufthansa, Air France, Emirates)
May restrict both size and weight, and budget airlines (like Ryanair or EasyJet) often charge extra for carry-ons beyond a small personal item.
Should You Choose an International or Domestic Carry-On Bag?
Choose an International Carry-On If:
- You frequently travel abroad, especially on budget airlines.
- You want a "one-size-fits-all" bag that’s safe for both domestic and international flights.
- You value mobility, lighter packing, and avoiding checked bag fees.
Choose a Domestic Carry-On If:
- You mostly fly within the U.S. or on airlines with relaxed size policies.
- You need more packing space for short trips without checking a bag.
- You don’t plan to travel internationally in the near future.
Top Tips for Choosing the Right Carry-On
- Measure carefully. Make sure to include wheels and handles.
- Check airline policies before every trip. Rules can change.
- Consider soft-sided bags. These are often more flexible for tight cabin spaces.
- Use packing cubes to maximize space and organization.
- Weigh your bag at home if flying with international carriers that enforce weight limits.
Conclusion
The difference between an international and domestic carry-on mainly comes down to size and weight restrictions, which are based on regional airline standards. If you travel globally, a slightly smaller international carry-on offers the most flexibility. But for frequent U.S. travelers, a domestic-sized bag may offer more room and convenience.