| Oppegard to Orbetello | 1,199.12 mi (1,929.79 km) |
| Oppegard to Oria | 1,365.26 mi (2,197.18 km) |
| Oppegard to Oristano | 1,377.34 mi (2,216.62 km) |
| Oppegard to Orta Nova | 1,292.88 mi (2,080.68 km) |
| Oppegard to Orte | 1,199.45 mi (1,930.33 km) |
| Oppegard to Ortona | 1,214.86 mi (1,955.14 km) |
| Oppegard to Orvieto | 1,181.03 mi (1,900.69 km) |
| Oppegard to Orzinuovi | 995.05 mi (1,601.39 km) |
| Oppegard to Osimo | 1,132.53 mi (1,822.62 km) |
| Oppegard to Ospitaletto | 984.14 mi (1,583.82 km) |
| Oppegard to Ostuni | 1,348.93 mi (2,170.90 km) |
| Oppegard to Ottaviano | 1,318.37 mi (2,121.72 km) |
| Oppegard to Ovada | 1,050.78 mi (1,691.07 km) |
| Oppegard to Ozieri | 1,329.35 mi (2,139.38 km) |
| Oppegard to Paceco | 1,508.86 mi (2,428.28 km) |
