I wouldn't recommend that at all. Taking the Blue Line to the Red Line takes you all the way downtown, just to head north again. And, with Red Line construction it will take longer than usual to get up north. Get off at the Blue Line Addison stop and take the bus east. It drops you off right in front of the stadium, and you're almost guaranteed to be riding with a busload of Cubs fans. The total trip should take you 45-60 minutes. Alrighty. I've never taken the blue line in from O'hare. Thx for the correction. I don't like buses though, but to me it would be better than walking. the buses seemed cleaner and nicer than the train did, fwiw