My husband and I are staying at the Michigan Ave. Westin (909 North Michigan Avenue) on Saturday and leaving for the airport on Sunday morning. Our flight leaves from O'Hare at 3:05 pm. I figure to be safe, we should hop on the train by 12:30. Are there any places near our hotel walking distance that has great sandwiches to go for the plane ride? How about any places for an early lunch? Thanks Chowhounders!