I have no clue, we drove to Rosemont from the suburbs.

847-692-2200 is the only number I have.

We stayed at the Marriot Suites. Not within walking distance, but a lyft or Uber can take you there for a small fee.

Cost me $15 for 1/2 day

2nd floor

Your better off to stay within walking distance or at a hotel that provides a free shuttle service.

The convention center is connected to the hotel, this is from the Hyatt Regency O'Hare website; To / From O’Hare International Airport: •Complimentary Shuttle Service - Chicago airport transportation is easy when you take advantage of our 24 hour, complimentary shuttle service, which runs every 15 minutes from our hotel near O’Hare airport. Follow the red shuttle signs at the airport to the designated pick-up area, O’Hare bus / Shuttle Center Door One. Shuttle buses are purple with white signage that reads Hyatt Regency O’Hare. For airport transportation from the international terminal, guests must call the hotel directly