Posted: 18/08/2016 at 22:07
I'd say you'd be struggling to get from O'Hare to the get your bib if you land that evening at 6:30pm. It might be doable if you get a taxi straight there from the airport, rather than taking the train into the city.
I don't think there was a breakfast run the year I did it. If you want to stretch the legs out on Saturday morning, if your based near the start at Grant Park, the lakeside is a great place to go for a morning run amongst the locals.
I'm not sure if they've changed things since, but a lot of the marathon gear is sold at the Nike store on the Magnificent Mile as well as from the expo. I fact in 2012 the shirts with 'finisher' on it were sold from that store, which is something I didn't find out until I saw someone wander by wearing one at O'Hare when leaving!