The cause of the damage is unknown.
The Thunder were travelling to Chicago to face the Bulls later Saturday following a 119-116 loss to Minnesota on Friday.
Numerous players posted about the incident on social media and had been curious as to what caused the damage. The aircraft, a Boeing 757-200, landed safely without incident; customers have since deplaned and maintenance teams evaluating.
Hey @NASA @neiltyson @BillNye We had a rough flight to say the least.
Elizabeth Wolf, a spokeswoman for Delta, said she believes the plane hit a bird as the plane descended into Chicago about 12:45 a.m.
Steven Adams on court for the Oklahoma City Thunder.
But a Thunder spokesperson told an Oklahoma newspaper that all players, staff and coaches were safe. Anthony wrote on Instagram before reassuring his fans that the team made it safely to the ground. "Safety is Delta's top priority".
It's not entirely clear yet what happened, though Carmelo Anthony suggested that the plane hit something, writing, "What possibly could we have hit in the SKY at this time of night?"