| Barrow in Furness to Oerlinghausen | 515.09 mi (828.96 km) |
| Barrow in Furness to Oestrich-Winkel | 554.18 mi (891.87 km) |
| Barrow in Furness to Offenburg | 618.94 mi (996.08 km) |
| Barrow in Furness to Oftersheim | 601.00 mi (967.22 km) |
| Barrow in Furness to Ohrdruf | 628.49 mi (1,011.45 km) |
| Barrow in Furness to Ohringen | 641.01 mi (1,031.60 km) |
| Barrow in Furness to Olbernhau | 735.66 mi (1,183.92 km) |
| Barrow in Furness to Olching | 748.80 mi (1,205.07 km) |
| Barrow in Furness to Oldenburg | 472.95 mi (761.14 km) |
| Barrow in Furness to Oldenburg in Holstein | 569.38 mi (916.33 km) |
| Barrow in Furness to Olfen | 471.41 mi (758.66 km) |
| Barrow in Furness to Olpe | 510.61 mi (821.74 km) |
| Barrow in Furness to Olsberg | 524.98 mi (844.87 km) |
| Barrow in Furness to Oranienburg | 682.53 mi (1,098.43 km) |
| Barrow in Furness to Ortenberg | 579.81 mi (933.11 km) |
