| Maardu to Oria | 1,349.69 mi (2,172.12 km) |
| Maardu to Oristano | 1,529.14 mi (2,460.91 km) |
| Maardu to Orta Nova | 1,316.14 mi (2,118.13 km) |
| Maardu to Orte | 1,292.82 mi (2,080.59 km) |
| Maardu to Ortona | 1,266.94 mi (2,038.95 km) |
| Maardu to Orvieto | 1,281.06 mi (2,061.67 km) |
| Maardu to Orzinuovi | 1,155.81 mi (1,860.10 km) |
| Maardu to Osimo | 1,207.42 mi (1,943.16 km) |
| Maardu to Ospitaletto | 1,143.17 mi (1,839.75 km) |
| Maardu to Ostuni | 1,334.40 mi (2,147.51 km) |
| Maardu to Ottaviano | 1,365.11 mi (2,196.93 km) |
| Maardu to Ovada | 1,231.52 mi (1,981.95 km) |
| Maardu to Ozieri | 1,477.48 mi (2,377.77 km) |
| Maardu to Paceco | 1,583.99 mi (2,549.18 km) |
| Maardu to Pachino | 1,633.77 mi (2,629.30 km) |
