Do the offer free shuttle service to ORD airport? Does it run 24/7?
We had to wait a while but I believe if you call them they will show up at any time
You shuttle from door 1 at the airport shuttle centre with ParknJet. They are supposed to shuttle every 30 minutes 24/7 but as I said in my review that they drove past us without even stopping or advising when the next shuttle would be. The shuttle is "on call" from the hotel.
Get an answer from Candlewood Suites Chicago O'Hare staff and past guests.