O’Hare International Airport allows service and working animals inside passenger terminals if they are on a leash. The airport has three outdoor pet relief areas located in front of Terminals 1, 2, and 5, and at the Multi Modal Facility. The pet relief areas have gravel, grass, wood chips, plastic bags, and garbage cans for easy clean-up. The airport also has two indoor pet relief areas past security at Terminals 3 at the Main Hall and Rotunda.