| Hilo to Oswego (Illinois) | 4,138.15 mi (6,659.72 km) |
| Hilo to Oswego (New York) | 4,730.90 mi (7,613.64 km) |
| Hilo to Otsego (Minnesota) | 3,885.06 mi (6,252.40 km) |
| Hilo to Ottawa (Illinois) | 4,112.95 mi (6,619.16 km) |
| Hilo to Ottawa (Kansas) | 3,768.65 mi (6,065.05 km) |
| Hilo to Ottumwa (Iowa) | 3,925.81 mi (6,317.99 km) |
| Hilo to Overland (Missouri) | 4,032.80 mi (6,490.17 km) |
| Hilo to Overland Park (Kansas) | 3,800.45 mi (6,116.23 km) |
| Hilo to Overlea (Maryland) | 4,769.21 mi (7,675.30 km) |
| Hilo to Oviedo (Florida) | 4,629.38 mi (7,450.26 km) |
| Hilo to Owasso (Oklahoma) | 3,733.07 mi (6,007.79 km) |
| Hilo to Owatonna (Minnesota) | 3,896.80 mi (6,271.29 km) |
| Hilo to Owensboro (Kentucky) | 4,211.48 mi (6,777.73 km) |
| Hilo to Owings Mills (Maryland) | 4,754.27 mi (7,651.25 km) |
| Hilo to Owosso (Michigan) | 4,348.53 mi (6,998.28 km) |
