| Red Oak to Orbetello | 5,540.10 mi (8,915.93 km) |
| Red Oak to Oria | 5,885.16 mi (9,471.25 km) |
| Red Oak to Oristano | 5,528.60 mi (8,897.43 km) |
| Red Oak to Orta Nova | 5,771.05 mi (9,287.61 km) |
| Red Oak to Orte | 5,587.74 mi (8,992.59 km) |
| Red Oak to Ortona | 5,674.52 mi (9,132.26 km) |
| Red Oak to Orvieto | 5,565.89 mi (8,957.44 km) |
| Red Oak to Orzinuovi | 5,370.84 mi (8,643.53 km) |
| Red Oak to Osimo | 5,590.28 mi (8,996.69 km) |
| Red Oak to Ospitaletto | 5,370.40 mi (8,642.82 km) |
| Red Oak to Ostuni | 5,872.87 mi (9,451.47 km) |
| Red Oak to Ottaviano | 5,740.89 mi (9,239.07 km) |
| Red Oak to Ovada | 5,348.04 mi (8,606.84 km) |
| Red Oak to Ozieri | 5,519.99 mi (8,883.56 km) |
| Red Oak to Paceco | 5,778.85 mi (9,300.16 km) |
