"On my way to NJ for work and #Southwest957 gets a window crack," said Alejandro Aguina on Twitter. "Only outside crack so we're all safe."
Minutes later, Aguina tweeted that passengers had boarded a new plane and were on their way to New Jersey.
"Just glad we're safe and we got it sorted," he said. Commend to the pilots, crew, and traffic control for @SouthwestAir."
According to Flightaware.com, the twin-engine Boeing 737 departed from Chicago's Midway International Airport at 9:53 a.m.
The plane rose to 33,000 feet and then turned in a counterclockwise direction while flying over Lake Erie in Ohio, before gradually descending just before 10:45 a.m.
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