Knowing where you can smoke at ORD Airport Smoking Areas helps you prepare for a smoother journey. The airport maintains a smoke free indoor environment, so passengers must use designated outdoor smoking areas before entering the terminal's secure section. Travelers who leave after clearing security should expect to go through screening again before returning to their departure gate. Check your boarding time carefully and allow extra time if you plan to step outside. This will help you stay relaxed and avoid last minute delays before your flight.