From the FAA website...
Due to WEATHER / LOW CEILINGS, there is a Traffic Management Program in effect for traffic arriving General Edward Lawrence Logan International Airport, Boston, MA (BOS). This is causing some arriving flights to be delayed an average of 1 hour and 14 minutes.
Due to WEATHER / THUNDERSTORMS, there is a Traffic Management Program in effect for traffic arriving La Guardia Airport, New York, NY (LGA). This is causing some arriving flights to be delayed an average of 1 hour and 42 minutes
Due to WEATHER / THUNDERSTORMS, there is a Traffic Management Program in effect for traffic arriving Newark International Airport, Newark, NJ (EWR). This is causing some arriving flights to be delayed an average of 2 hours and 43 minutes
And since you're at ORD...
Due to OTHER / AIR SHOW, there is a Traffic Management Program in effect for traffic arriving Chicago OHare International Airport, Chicago, IL (ORD)