| Brookings to Orbetello | 4,978.45 mi (8,012.03 km) |
| Brookings to Oria | 5,305.25 mi (8,537.97 km) |
| Brookings to Oristano | 5,001.85 mi (8,049.70 km) |
| Brookings to Orta Nova | 5,195.08 mi (8,360.68 km) |
| Brookings to Orte | 5,020.02 mi (8,078.94 km) |
| Brookings to Ortona | 5,097.54 mi (8,203.69 km) |
| Brookings to Orvieto | 4,997.51 mi (8,042.71 km) |
| Brookings to Orzinuovi | 4,791.24 mi (7,710.76 km) |
| Brookings to Osimo | 5,009.13 mi (8,061.42 km) |
| Brookings to Ospitaletto | 4,788.90 mi (7,707.00 km) |
| Brookings to Ostuni | 5,291.52 mi (8,515.88 km) |
| Brookings to Ottaviano | 5,175.04 mi (8,328.43 km) |
| Brookings to Ovada | 4,780.66 mi (7,693.73 km) |
| Brookings to Ozieri | 4,985.19 mi (8,022.88 km) |
| Brookings to Paceco | 5,246.39 mi (8,443.25 km) |
