| Fort Pierce to Oswego (Illinois) | 1,083.84 mi (1,744.27 km) |
| Fort Pierce to Oswego (New York) | 1,127.88 mi (1,815.15 km) |
| Fort Pierce to Otsego (Minnesota) | 1,432.79 mi (2,305.86 km) |
| Fort Pierce to Ottawa (Illinois) | 1,075.81 mi (1,731.35 km) |
| Fort Pierce to Ottawa (Kansas) | 1,156.17 mi (1,860.68 km) |
| Fort Pierce to Ottumwa (Iowa) | 1,162.85 mi (1,871.43 km) |
| Fort Pierce to Overland (Missouri) | 969.94 mi (1,560.96 km) |
| Fort Pierce to Overland Park (Kansas) | 1,144.20 mi (1,841.42 km) |
| Fort Pierce to Overlea (Maryland) | 853.65 mi (1,373.82 km) |
| Fort Pierce to Oviedo (Florida) | 99.51 mi (160.14 km) |
| Fort Pierce to Owasso (Oklahoma) | 1,093.67 mi (1,760.10 km) |
| Fort Pierce to Owatonna (Minnesota) | 1,355.69 mi (2,181.77 km) |
| Fort Pierce to Owensboro (Kentucky) | 814.94 mi (1,311.52 km) |
| Fort Pierce to Owings Mills (Maryland) | 852.90 mi (1,372.61 km) |
| Fort Pierce to Owosso (Michigan) | 1,097.00 mi (1,765.44 km) |
