If you are talented enough to pack everything you need for your vacation in carry-on luggage: high-five! You're awesome and low maintenance, and we couldn't be more proud of you.Before you run off to the airport, it is always good to double check that your carry-on luggage meets airline guidelines to ensure your trip runs seamlessly from start to finish.Most US airlines limit passengers to a maximum of one carry-on luggage piece and a personal item that is small enough to store below your seat or in the overhead compartment. Personal items may include; a briefcase, duffel bag, backpack, laptop, tote, or handbag.We recommend that you check with your airline first, but most domestic flights permit a carry-on luggage piece that does not exceed 22" x 14" x 9" or 45" linear inches . The majority of airlines also have a carry-on luggage weight limit of 40 pounds, so if you packed your bag with books, hefty toiletries, or bulky electronic devices, you may want to weigh your bag to avoid any fees. Most of the time, these heavy items can easily be moved from your carry-on to your personal item or removed altogether.Remember, carry-on luggage standards vary from airline to airline; therefore, travelers are advised to contact their airline or refer to their airline's website prior to departure to ensure the size and weight standards are met.For those of you planning to stamp your passport. remember international airlines may have different restrictions for carry-on luggage. Again, it is always best to check with your airline first to get their exact requirements.