Arriving on AA. Heading out on Malev.

Bags will be checked through so not a hassle. As for the have to be at the airport 2 hours early. How much of a rule is that? And what exactly is it for? I am not checking in in Paris. I'll already have done that in NY before going to ORD.

I admit I hadnt thought about rush hour but I am just wanting to run into town, grab something at a specific place if they're open, and head back out.

Its an hour on the bus into town? Or an hour at the airport?

I don't mind getting back to the airport 1 hour before the flight if all I have to do is clear security and get on a plane.