[3][4][5] On July 26, 2019, it was announced that d'Orlando would compete in the Formula 4 United States Championship with Velocity Racing Development starting at the third round at Virginia International Raceway.

[6] He would end up with a third place finish at the final race at Circuit of the Americas.

After a brief stint in the U.S. F2000 National Championship in 2018 with Team Benik, d'Orlando announced on March 3, 2020, that he would return to the series for the full 2020 season and drive for Cape Motorsports.

[8] On February 17, 2021, d'Orlando confirmed that he would return to the championship with Cape Motorsports for the 2021 season.

[9] He would compete for the championship all season with competitors Myles Rowe and Jace Denmark.