It's not walkable, but your hotel does offer a 24-hour shuttle service to the airport according to its website. The shuttles that drop you off at the airport drop you off directly above the O'Hare El stop. Just look for the overhead signs, they'll tell you how to get from the bus/shuttle center to the train station. If you want to walk to an El stop your best bet is to find a hotel closer to the Rosement station. It's on N River Road, and there are at least a couple hotels within a few blocks of that stop. As I mentioned before, we have stayed in Rosemont a number of times, and the Best Western is not really near the Rosemont stop - from there it would be better to take the free shuttle to the airport, then catch things there. If you would rather use the Rosemont station, the couple of hotels that are fairly near there (that we've stayed at) are: The Chicago Marriott Suites (probably the closest) Westin O'Hare Embassy Suites None of these places are cheap, but they are nice. I've stayed at that Mariott a couple of times and I highly reccomend it. I doubt it's in my budget, and if the Best Western offers a 24 hour shuttle to the el stop, that's good enough for me.