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Carryon items are limited to one bag plus one smaller, personal-type item. Southwest Airlines limits carryon bag dimensions to 10 x 16 x 24 inches. All Customers and Employees and their items are subject to a thorough physical search.
Liquid or gel food items larger than 3.4 oz are not allowed in carry–on bags and should be placed in your checked bags if possible. TSA officers may instruct travelers to separate items from carry–on bags such as foods, powders, and any materials that can clutter bags and obstruct clear images on the X-ray machine.
Southwest will accept the first two checked bags for free provided that the bags do not exceed 50 lbs and 62 inches (L+W+H). Overweight items from 51 to 100 pounds and oversized items in excess of 62 inches but not more than 80 inches will be accepted for a charge of $75.00 per item one-way.
Medication in liquid form is allowed in carry-on bags in excess of 3.4 ounces in reasonable quantities for the flight. It is not necessary to place medically required liquids in a zip-top bag. However, you must tell the officer that you have medically necessary liquids at the start of the screening checkpoint process.
Southwest airlines carry on items are limited to one bag, plus one small, personal item. 10 x 16 x 24 inches. you must place your cabin bag in the cabin above and it must fit the cabin, placing it wheels facing out helps us get wheels faster.