Santa, lower left, waves aboard an open-air car on the CTA Holiday Train traveling south toward the Merchandise Mart on Dec. 3, 2025. (John J. Kim/Chicago Tribune) A CTA elf greets passengers on the CTA Holiday Train, Dec. 3, 2025, on the Orange Line "L." (Brian Cassella/Chicago Tribune) Santa Claus rides the CTA Holiday Train on the outbound Blue Line past the Damen station, Dec. 11, 2025, in Chicago. (John J. Kim/Chicago Tribune) The CTA Holiday Train runs over the Chicago River on the Wells Street bridge in Chicago, Dec. 3, 2025. (Dominic Di Palermo/Chicago Tribune) The CTA Holiday Train heads rolls south toward the Merchandise Mart, Dec. 3, 2025, in Chicago. (John J. Kim/Chicago Tribune) A CTA elf stands with the Holiday Train, Dec. 3, 2025, on the Orange Line “L.” (Brian Cassella/Chicago Tribune) Santa prepares to depart Midway International Airport on his open-air CTA Holiday Train car on Dec. 3, 2025, on the Orange Line "L." (Brian Cassella/Chicago Tribune) Santa rides the CTA Holiday Train on the outbound Blue Line past the Damen station, Dec. 11, 2025, in Chicago. (John J. Kim/Chicago Tribune) Gov. JB Pritzker hands out candy canes to passengers while riding the CTA Holiday Train, Dec. 3, 2025, on the Orange Line "L." (Brian Cassella/Chicago Tribune) The CTA Holiday Train heads north on Brown Line tracks past the Merchandise Mart, Dec. 3, 2025, in Chicago. (John J. Kim/Chicago Tribune) ...read more read less