In 2019, Andretti Autosport signed Daly to enter the Indianapolis 500, where he finished tenth. On June 4, 2019, he replaced Max Chilton at Carlin for the Texas Motor Speedway race, finishing 11th. Daly would replace Chilton at the remaining oval races for the season, with a best result of 6th place at Gateway. On August 29, 2019, Daly was announced as a replacement for Marcus Ericsson for the round at Portland as Ericsson had been called up by Alfa Romeo to be on reserve driver duty at the F1 race at Spa. Daly would also return to Andretti Autosport for the season finale.