| Barth to Oria | 984.66 mi (1,584.66 km) |
| Barth to Oristano | 1,017.34 mi (1,637.26 km) |
| Barth to Orta Nova | 911.12 mi (1,466.30 km) |
| Barth to Orte | 822.79 mi (1,324.15 km) |
| Barth to Ortona | 833.80 mi (1,341.87 km) |
| Barth to Orvieto | 805.30 mi (1,296.00 km) |
| Barth to Orzinuovi | 631.68 mi (1,016.59 km) |
| Barth to Osimo | 752.76 mi (1,211.45 km) |
| Barth to Ospitaletto | 619.93 mi (997.67 km) |
| Barth to Ostuni | 968.34 mi (1,558.40 km) |
| Barth to Ottaviano | 937.43 mi (1,508.65 km) |
| Barth to Ovada | 696.18 mi (1,120.39 km) |
| Barth to Ozieri | 967.55 mi (1,557.11 km) |
| Barth to Paceco | 1,132.01 mi (1,821.79 km) |
| Barth to Pachino | 1,224.76 mi (1,971.06 km) |
