| Killingworth to Oerlinghausen | 469.88 mi (756.19 km) |
| Killingworth to Oestrich-Winkel | 530.50 mi (853.75 km) |
| Killingworth to Offenburg | 607.64 mi (977.91 km) |
| Killingworth to Oftersheim | 579.82 mi (933.14 km) |
| Killingworth to Ohrdruf | 587.30 mi (945.17 km) |
| Killingworth to Ohringen | 617.11 mi (993.15 km) |
| Killingworth to Olbernhau | 688.76 mi (1,108.45 km) |
| Killingworth to Olching | 724.51 mi (1,165.99 km) |
| Killingworth to Oldenburg | 416.45 mi (670.21 km) |
| Killingworth to Oldenburg in Holstein | 498.95 mi (802.99 km) |
| Killingworth to Olfen | 433.37 mi (697.44 km) |
| Killingworth to Olpe | 478.12 mi (769.46 km) |
| Killingworth to Olsberg | 486.59 mi (783.08 km) |
| Killingworth to Oranienburg | 621.20 mi (999.73 km) |
| Killingworth to Ortenberg | 548.44 mi (882.63 km) |
