No one wants to show up for their flight with the wrong size or weight for their carry-on bag. To make sure you don’t fall foul of the rules, we’ve pulled together a list of the major US airlines’ cabin bag allowances so you know the carry-on luggage weight limit for international and domestic travel.

What to know about carry-on luggage

Besides your personal item, which can be something like a purse, briefcase, laptop case, or backpack, you may also be allowed to bring a carry-on bag, like a roller bag, duffle bag, or small suitcase. The personal item typically needs to fit under the seat in front of you, while the carry-on can be placed in the overhead bin. Those traveling with a pet need to count the pet’s carrier as their personal item or carry-on since it will be placed under the seat in front of them.

When it comes to carry-on luggage, you might be wondering about weight restrictions and the possibility of a last-minute check. Though airlines often emphasize the dimensions of your carry-on, they may also check the weight of your luggage for compliance. To sidestep any hitches, it's wise to weigh your packed bag before your journey begins. The typical weight threshold for a carry-on is approximately 25 lbs for those traveling in economy. But this varies by carrier, so be sure to review your airline's specific guidelines to avoid any unforeseen charges or the inconvenience of having to check your bag at the last minute at the gate.

US airlines carry-on luggage size and weight restrictions

Whether you’re flying on American Airlines, Delta, Southwest Airlines, or JetBlue, you’ll need to know the size and weight restrictions for cabin bags before you fly. This goes for your personal item and carry-on bag. Most airlines focus on the dimensions of your carry-on bag rather than weight, but some will weigh it if they indicate a limit on their website. Use the table below for quick reference.

Tips for packing your carry-on luggage

• Weigh your bag: Do airlines check carry-on weight? Yes, some do. To avoid any surprises at the airport, weigh your bag at home using a luggage scale and check with your airline to see if there are limits.

• Space maximization: Use packing cubes or compression bags to optimize your carry-on capacity.

• Balance the load: Distribute the weight evenly to avoid any lopsidedness and prevent overburdening on one side.

• Check the rules: The carry-on luggage weight limit for international travel can vary depending on your airline and the destination you’re flying to, so check with the airline before your flight.

All the information above is correct as of July 2025. Always check the latest guidance before booking a trip.

Final thoughts: Carry-on luggage size and weight limits, international and domestic

Knowing the weight limit for your international carry-on and the guidelines set by your airline will be your ticket to a seamless travel experience. Weigh your bag, make the most of the space, and double-check those rules. Here's to smooth sailing—have a fantastic trip!