Terminal of O'Hare International Airport is home to Spirit Airlines Chicago Office . For passengers flying with Spirit, the office handles ticketing, check-in, baggage management, and customer service, among other crucial services. Travelers who need help with travel reservations, adjustments, cancellations, or missing or delayed luggage should stop by the office. The office is open many hours prior to departure and remains open until the final flight of the day in order to accommodate flight schedules. Although Spirit prefers online check-in to save time and money, in-person assistance is available at the Chicago office if necessary.