Here's a nice little nonstop from New York JFK to Chicago O'Hare for $220 round-trip, including all taxes, on both Delta and JetBlue. We found seats departing on January 7, and returning January 14.
Travel is valid Tuesdays, Wednesdays, and Saturdays, through April 30. Tickets require a 21-day advance purchase. No minimum stay required.
For booking info, see our Fare Details.