Updated. Through 7/30, JetBlue marks down many one-way fares starting from $39 as part of their Spring Sale. Better yet, click and use code EARLYBIRD stacks to take 20% off! This drops the price of a ticket from New York to Chicago from $89 to $80 each way! Travel must be between September 7 and December 15. Perks on JetBlue flights include unlimited snacks and DirectTV! See the website for more details, black out dates and other restrictions.