A Delta Air Lines flight made an abrupt U-turn shortly after takeoff from San Antonio International Airport due to a reported engine issue. The Airbus A320, carrying 136 passengers and six crew members, returned to the airport and landed safely. The San Antonio Fire Department (SAFD) confirmed that smoke was observed coming from one of the aircraft's engines, prompting an initial response from emergency services. However, upon further inspection, no fire was detected, and the incident was deemed not an emergency landing. The Federal Aviation Administration (FAA) confirmed the safe return of the plane, and there were no reported injuries or incidents. Delta Air Lines maintenance teams are evaluating the aircraft, and the FAA will investigate the incident. Passengers were later accommodated on alternative flights to ensure their timely arrival at their destinations. The airline apologized for the delay, and the San Antonio International Airport did not immediately respond to a request for comment.