United Airlines ORD Terminal +1-888-839-0502 The efficiency of security at united airlines terminal chicago ord was impressive. TSA officers were well-organized, the line flowed smoothly, and United employees were on hand to assist passengers with the procedure. Even during the busiest commute period, I completed the journey in less than 20 minutes. It never felt crowded, and there were enough signs to keep things clear. Thanks to excellent coordination, it's refreshing to pass through a huge hub like O'Hare and yet have a seamless, well-run security experience.