A United Airlines spokesman said the wing of a cargo plane clipped the tail of a United Express jet at O'Hare International Airport, but no one was hurt.
United spokesman Rahsaan Johnson told the Chicago Tribune that the United flight was pulling into the gate about 9:15 p.m. Saturday when the accident happened. He said it didn't cause a commotion, and the 27 passengers and crew on board didn't even realize what had happened. All got off the plane safely.
The United Express flight had come in from Charlotte, North Carolina.
Johnson said he didn't yet know whether the snow in Chicago played a role in the accident. The airline is investigating.
Even after the snow stopped falling Saturday, the weather still caused delays at Chicago's largest airport.
The Chicago Department of Aviation said delays were averaging 20 minutes Saturday evening for flights in and out of O'Hare International Airport. More than 325 flights were canceled.
Across town at Midway International Airport, airlines were reporting no delays and no cancellations late Saturday. Earlier in the day, delays were averaging 30 minutes.
Aviation officials are advising travelers to check their airlines' website to check the status of flights.