| Horn-Bad Meinberg to Oria | 887.60 mi (1,428.46 km) |
| Horn-Bad Meinberg to Oristano | 827.76 mi (1,332.15 km) |
| Horn-Bad Meinberg to Orta Nova | 795.47 mi (1,280.18 km) |
| Horn-Bad Meinberg to Orte | 670.39 mi (1,078.88 km) |
| Horn-Bad Meinberg to Ortona | 706.00 mi (1,136.19 km) |
| Horn-Bad Meinberg to Orvieto | 649.98 mi (1,046.04 km) |
| Horn-Bad Meinberg to Orzinuovi | 450.11 mi (724.38 km) |
| Horn-Bad Meinberg to Osimo | 616.93 mi (992.86 km) |
| Horn-Bad Meinberg to Ospitaletto | 440.11 mi (708.29 km) |
| Horn-Bad Meinberg to Ostuni | 871.88 mi (1,403.15 km) |
| Horn-Bad Meinberg to Ottaviano | 805.75 mi (1,296.72 km) |
| Horn-Bad Meinberg to Ovada | 500.73 mi (805.85 km) |
| Horn-Bad Meinberg to Ozieri | 780.65 mi (1,256.33 km) |
| Horn-Bad Meinberg to Paceco | 975.95 mi (1,570.64 km) |
| Horn-Bad Meinberg to Pachino | 1,089.94 mi (1,754.09 km) |
