Carry-on bags: You’re allowed a small personal item that fits under the seat in front of you, such as a shoulder bag, purse, laptop bag or other small item, 9 inches x 10 inches x 17 inches (22 cm x 25 cm x 43 cm) or less
也就是说你只能最多带一个双肩背包。9 inches x 10 inches x 17 inches (22 cm x 25 cm x 43 cm) or less
除非你是MileagePlus Premier member,才能带全尺寸随身行李。就是那个随身小拉箱。