| Formia to Oswego (Illinois) | 4,919.09 mi (7,916.51 km) |
| Formia to Oswego (New York) | 4,359.52 mi (7,015.98 km) |
| Formia to Otsego (Minnesota) | 4,963.20 mi (7,987.50 km) |
| Formia to Ottawa (Illinois) | 4,953.01 mi (7,971.10 km) |
| Formia to Ottawa (Kansas) | 5,334.62 mi (8,585.24 km) |
| Formia to Ottumwa (Iowa) | 5,110.46 mi (8,224.49 km) |
| Formia to Overland (Missouri) | 5,133.71 mi (8,261.92 km) |
| Formia to Overland Park (Kansas) | 5,298.35 mi (8,526.87 km) |
| Formia to Overlea (Maryland) | 4,515.72 mi (7,267.34 km) |
| Formia to Oviedo (Florida) | 5,172.74 mi (8,324.71 km) |
| Formia to Owasso (Oklahoma) | 5,467.14 mi (8,798.50 km) |
| Formia to Owatonna (Minnesota) | 5,001.99 mi (8,049.92 km) |
| Formia to Owensboro (Kentucky) | 5,040.44 mi (8,111.81 km) |
| Formia to Owings Mills (Maryland) | 4,525.96 mi (7,283.83 km) |
| Formia to Owosso (Michigan) | 4,695.63 mi (7,556.88 km) |
